Commit Graph

65972 Commits

Author SHA1 Message Date
Will Deacon ec6931b281 word-at-a-time: avoid undefined behaviour in zero_bytemask macro
The asm-generic, big-endian version of zero_bytemask creates a mask of
bytes preceding the first zero-byte by left shifting ~0ul based on the
position of the first zero byte.

Unfortunately, if the first (top) byte is zero, the output of
prep_zero_mask has only the top bit set, resulting in undefined C
behaviour as we shift left by an amount equal to the width of the type.
As it happens, GCC doesn't manage to spot this through the call to fls(),
but the issue remains if architectures choose to implement their shift
instructions differently.

An example would be arch/arm/ (AArch32), where LSL Rd, Rn, #32 results
in Rd == 0x0, whilst on arch/arm64 (AArch64) LSL Xd, Xn, #64 results in
Xd == Xn.

Rather than check explicitly for the problematic shift, this patch adds
an extra shift by 1, replacing fls with __fls. Since zero_bytemask is
never called with a zero argument (has_zero() is used to check the data
first), we don't need to worry about calling __fls(0), which is
undefined.

Cc: <stable@vger.kernel.org>
Cc: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-27 15:20:05 -07:00
Linus Torvalds d9e9e8e2fe Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
 "A slighlty large fix for a subtle issue in the CPU hotplug code of
  certain ARM SoCs, where the not yet online cpu needs to setup the cpu
  local timer and needs to set the interrupt affinity to itself.
  Setting interrupt affinity to a not online cpu is prohibited and
  therefor the timer interrupt ends up on the wrong cpu, which leads to
  nasty complications.

  The SoC folks tried to hack around that in the SoC code in some more
  than nasty ways.  The proper solution is to have a way to enforce the
  affinity setting to a not online cpu.  The core patch to the genirq
  code provides that facility and the follow up patches make use of it
  in the GIC interrupt controller and the exynos timer driver.

  The change to the core code has no implications to existing users,
  except for the rename of the locked function and therefor the
  necessary fixup in mips/cavium.  Aside of that, no runtime impact is
  possible, as none of the existing interrupt chips implements anything
  which depends on the force argument of the irq_set_affinity()
  callback"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: Exynos_mct: Register clock event after request_irq()
  clocksource: Exynos_mct: Use irq_force_affinity() in cpu bringup
  irqchip: Gic: Support forced affinity setting
  genirq: Allow forcing cpu affinity of interrupts
2014-04-27 11:21:03 -07:00
Linus Torvalds a8d706986c TTY/Serial fixes for 3.15-rc3
Here are a few tty/serial fixes for 3.15-rc3 that resolve a number of
 reported issues in the 8250 and samsung serial drivers, as well as a
 character loss fix for the tty core that was caused by the lock removal
 patches a release ago.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are a few tty/serial fixes for 3.15-rc3 that resolve a number of
  reported issues in the 8250 and samsung serial drivers, as well as a
  character loss fix for the tty core that was caused by the lock
  removal patches a release ago"

* tag 'tty-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial_core: fix uart PORT_UNKNOWN handling
  serial: samsung: Change barrier() to cpu_relax() in console output
  serial: samsung: don't check config for every character
  serial: samsung: Use the passed in "port", fixing kgdb w/ no console
  serial: 8250: Fix thread unsafe __dma_tx_complete function
  8250_core: Fix unwanted TX chars write
  tty: Fix race condition between __tty_buffer_request_room and flush_to_ldisc
2014-04-27 10:39:09 -07:00
Linus Torvalds fefb82756e USB fixes for 3.15-rc3
Here are a number of USB fixes for 3.15-rc3.  The majority are gadget
 fixes, as we didn't get any of those in for 3.15-rc2.  The others are
 all over the place, and there's a number of new device id addtions as
 well.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are a number of USB fixes for 3.15-rc3.  The majority are gadget
  fixes, as we didn't get any of those in for 3.15-rc2.  The others are
  all over the place, and there's a number of new device id addtions as
  well."

* tag 'usb-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (35 commits)
  usb: option: add and update a number of CMOTech devices
  usb: option: add Alcatel L800MA
  usb: option: add Olivetti Olicard 500
  usb: qcserial: add Sierra Wireless MC7305/MC7355
  usb: qcserial: add Sierra Wireless MC73xx
  usb: qcserial: add Sierra Wireless EM7355
  USB: io_ti: fix firmware download on big-endian machines
  usb/xhci: fix compilation warning when !CONFIG_PCI && !CONFIG_PM
  xhci: extend quirk for Renesas cards
  xhci: Switch Intel Lynx Point ports to EHCI on shutdown.
  usb: xhci: Prefer endpoint context dequeue pointer over stopped_trb
  phy: core: make NULL a valid phy reference if !CONFIG_GENERIC_PHY
  phy: fix kernel oops in phy_lookup()
  phy: restore OMAP_CONTROL_PHY dependencies
  phy: exynos: fix building as a module
  USB: serial: fix sysfs-attribute removal deadlock
  usb: wusbcore: fix panic in wusbhc_chid_set
  usb: wusbcore: convert nested lock to use spin_lock instead of spin_lock_irq
  uwb: don't call spin_unlock_irq in a USB completion handler
  usb: chipidea: coordinate usb phy initialization for different phy type
  ...
2014-04-27 10:24:17 -07:00
Linus Torvalds 3fe89d2e76 ARM: SoC fixes for 3.15-rc3:
Since we didn't get around to collect fixes in time for -rc2 over
 the easter vacation, this one is unfortunately a bit larger than
 we'd like for an -rc3 merge. A large set of the changes is in the
 device tree sources, so I'm splitting out the description between
 code changes and DT changes. Aside from omap and versatile express,
 the actual code bugs are sporadic and trivial. Here is an overview:
 
   imx:
    - fix video clock settings
    - fix one clock refcounting bug
 
   omap:
    - update defconfig for renamed USB PHY driver
    - fix error handling in gpmc
    - fix N900 video initialization regression
    - fix reression in hwmod code from missing braces
    - fix am43xx and omap3 clocks
    - remove bogus write to voltage control register
 
   pxa:
    - fix build regression from 3.13 header cleanup
 
   rockchip:
    - fix a misleading printk string
 
   shmobile:
    - fix incorrect sound setting on multiple machines
 
   spear:
    - remove incorrect __init section annotation
 
   tegra:
    - remove a stale Kconfig entry
 
   u300:
    - update defconfig
 
   ux500:
    - enable common wireless and sensor drivers in defconfig
    - more defconfig updates
 
   vexpress:
    - fix voltage calculation for opp
    - fix reboot hang and warning
    - fix out-of-bounds array access
    - improve error handling in clock driver
 
   overall:
    - always select CLKSRC_OF in multiplatform builds
 
 And these are the devicetree related changes:
 
   imx:
    - add missing #clock-cell properties
    - fix pinctrl setting in imx6sl-evk
    - fix video endpoint on imx53
    - remove obsolete lvds-channel nodes (multiple patches)
    - add missing second stmpe node
    - fix usb host mode on dmo-edmqmx6 (multiple patches)
    - fix gic node #address-cells to match usage
    - add missing legacy IRQ map for PCIe
    - fix microsom pincontrol setting for rgmii
    - fix fatal typo in touchscreen DT usage for mx5
    - list all RAM present on m53evk and mx53qsb
 
   omap:
    - fix bug in DT handling of gpmc external bus
    - add DT for older revision of beagleboard
    - fix regression after DT node name fixes
    - remove obsolete properties for gpmc
    - fix pinmux comment to match DT it refers to
    - fix newly added dra7xx clock node data
    - add missing clock for USB PHY
 
   mvebu:
    - add missing clock for mdio node
    - fix nonstandard vendor prefixes on i2c nodes
 
   rockchip:
    - fix pin control setting for uart
 
   shmobile:
    - fix typo in DT data for pin control (multiple patches)
    - fix gic node #address-cells to match usage
 
   tegra:
    - fix clock and uart DT representation to match hardware
 
   zynq:
    - add DT nodes for newly added driver
    - add DT properties required for cpufreq-ondemand
 
   overall:
    - restore alphabetic order in Makefile
    - grammar fixes in bindings
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Merge tag 'fixes-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Arnd Bergmann:
 "Since we didn't get around to collect fixes in time for -rc2 over the
  easter vacation, this one is unfortunately a bit larger than we'd like
  for an -rc3 merge.

  A large set of the changes is in the device tree sources, so I'm
  splitting out the description between code changes and DT changes.
  Aside from omap and versatile express, the actual code bugs are and
  trivial.  Here is an overview:

  imx:
   - fix video clock settings
   - fix one clock refcounting bug

  omap:
   - update defconfig for renamed USB PHY driver
   - fix error handling in gpmc
   - fix N900 video initialization regression
   - fix reression in hwmod code from missing braces
   - fix am43xx and omap3 clocks
   - remove bogus write to voltage control register

  pxa:
   - fix build regression from 3.13 header cleanup

  rockchip:
   - fix a misleading printk string

  shmobile:
   - fix incorrect sound setting on multiple machines

  spear:
   - remove incorrect __init section annotation

  tegra:
   - remove a stale Kconfig entry

  u300:
   - update defconfig

  ux500:
   - enable common wireless and sensor drivers in defconfig
   - more defconfig updates

  vexpress:
   - fix voltage calculation for opp
   - fix reboot hang and warning
   - fix out-of-bounds array access
   - improve error handling in clock driver

  overall:
   - always select CLKSRC_OF in multiplatform builds

  And these are the devicetree related changes:

  imx:
   - add missing #clock-cell properties
   - fix pinctrl setting in imx6sl-evk
   - fix video endpoint on imx53
   - remove obsolete lvds-channel nodes (multiple patches)
   - add missing second stmpe node
   - fix usb host mode on dmo-edmqmx6 (multiple patches)
   - fix gic node #address-cells to match usage
   - add missing legacy IRQ map for PCIe
   - fix microsom pincontrol setting for rgmii
   - fix fatal typo in touchscreen DT usage for mx5
   - list all RAM present on m53evk and mx53qsb

  omap:
   - fix bug in DT handling of gpmc external bus
   - add DT for older revision of beagleboard
   - fix regression after DT node name fixes
   - remove obsolete properties for gpmc
   - fix pinmux comment to match DT it refers to
   - fix newly added dra7xx clock node data
   - add missing clock for USB PHY

  mvebu:
   - add missing clock for mdio node
   - fix nonstandard vendor prefixes on i2c nodes

  rockchip:
   - fix pin control setting for uart

  shmobile:
   - fix typo in DT data for pin control (multiple patches)
   - fix gic node #address-cells to match usage

  tegra:
   - fix clock and uart DT representation to match hardware

  zynq:
   - add DT nodes for newly added driver
   - add DT properties required for cpufreq-ondemand

  overall:
   - restore alphabetic order in Makefile
   - grammar fixes in bindings"

* tag 'fixes-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (66 commits)
  ARM: vexpress/TC2: Convert OPP voltage to uV before storing
  power/reset: vexpress: Fix restart/power off operation
  dt: tegra: remove non-existent clock IDs
  clk: tegra: remove non-existent clocks
  ARM: tegra: remove UART5/UARTE from tegra124.dtsi
  ARM: tegra: remove TEGRA_EMC_SCALING_ENABLE
  ARM: Tidy up DTB Makefile entries
  ARM: fix missing CLKSRC_OF on multi-platform
  ARM: spear: add __init to spear_clocksource_init()
  ARM: pxa: hx4700.h: include "irqs.h" for PXA_NR_BUILTIN_GPIO
  arm/mach-vexpress: array accessed out of bounds
  clk: vexpress: NULL dereference on error path
  ARM: OMAP2+: Fix GPMC remap for devices using an offset
  ARM: zynq: dt: Add I2C nodes to Zynq device tree
  ARM: zynq: DT: Add 'clock-latency' property
  ARM: OMAP2+: Fix oops for GPMC free
  ARM: dts: Add support for the BeagleBoard xM A/B
  ARM: dts: Grammar /that will/it will/
  ARM: dts: Grammar /is uses/ is used/
  ARM: OMAP2+: Fix config name for USB3 PHY
  ...
2014-04-25 13:02:02 -07:00
Linus Torvalds 625bba662c File locking related bugfixes for v3.15 (pile #2)
- fix for a long-standing bug in __break_lease that can cause soft lockups
 - renaming of file-private locks to "open file description" locks, and the
   command macros to more visually distinct names.
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Merge tag 'locks-v3.15-2' of git://git.samba.org/jlayton/linux

Pull file locking fixes from Jeff Layton:
 "File locking related bugfixes for v3.15 (pile #2)

   - fix for a long-standing bug in __break_lease that can cause soft
     lockups
   - renaming of file-private locks to "open file description" locks,
     and the command macros to more visually distinct names

  The fix for __break_lease is also in the pile of patches for which
  Bruce sent a pull request, but I assume that your merge procedure will
  handle that correctly.

  For the other patches, I don't like the fact that we need to rename
  this stuff at this late stage, but it should be settled now
  (hopefully)"

* tag 'locks-v3.15-2' of git://git.samba.org/jlayton/linux:
  locks: rename FL_FILE_PVT and IS_FILE_PVT to use "*_OFDLCK" instead
  locks: rename file-private locks to "open file description locks"
  locks: allow __break_lease to sleep even when break_time is 0
2014-04-25 12:40:32 -07:00
Manfred Schlaegl 6a20dbd6ca tty: Fix race condition between __tty_buffer_request_room and flush_to_ldisc
The race was introduced while development of linux-3.11 by
e8437d7ecb and
e9975fdec0.
Originally it was found and reproduced on linux-3.12.15 and
linux-3.12.15-rt25, by sending 500 byte blocks with 115kbaud to the
target uart in a loop with 100 milliseconds delay.

In short:
 1. The consumer flush_to_ldisc is on to remove the head tty_buffer.
 2. The producer adds a number of bytes, so that a new tty_buffer must
	be allocated and added by __tty_buffer_request_room.
 3. The consumer removes the head tty_buffer element, without handling
	newly committed data.

Detailed example:
 * Initial buffer:
   * Head, Tail -> 0: used=250; commit=250; read=240; next=NULL
 * Consumer: ''flush_to_ldisc''
   * consumed 10 Byte
   * buffer:
     * Head, Tail -> 0: used=250; commit=250; read=250; next=NULL
{{{
		count = head->commit - head->read;	// count = 0
		if (!count) {				// enter
			// INTERRUPTED BY PRODUCER ->
			if (head->next == NULL)
				break;
			buf->head = head->next;
			tty_buffer_free(port, head);
			continue;
		}
}}}
 * Producer: tty_insert_flip_... 10 bytes + tty_flip_buffer_push
   * buffer:
     * Head, Tail -> 0: used=250; commit=250; read=250; next=NULL
   * added 6 bytes: head-element filled to maximum.
     * buffer:
       * Head, Tail -> 0: used=256; commit=250; read=250; next=NULL
   * added 4 bytes: __tty_buffer_request_room is called
     * buffer:
       * Head -> 0: used=256; commit=256; read=250; next=1
       * Tail -> 1: used=4; commit=0; read=250 next=NULL
   * push (tty_flip_buffer_push)
     * buffer:
       * Head -> 0: used=256; commit=256; read=250; next=1
       * Tail -> 1: used=4; commit=4; read=250 next=NULL
 * Consumer
{{{
		count = head->commit - head->read;
		if (!count) {
			// INTERRUPTED BY PRODUCER <-
			if (head->next == NULL)		// -> no break
				break;
			buf->head = head->next;
			tty_buffer_free(port, head);
			// ERROR: tty_buffer head freed -> 6 bytes lost
			continue;
		}
}}}

This patch reintroduces a spin_lock to protect this case. Perhaps later
a lock-less solution could be found.

Signed-off-by: Manfred Schlaegl <manfred.schlaegl@gmx.at>
Cc: stable <stable@vger.kernel.org> # 3.11
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-24 15:18:02 -07:00
Arnd Bergmann 1fc52762e3 ARM Versatile Express fixes for 3.15
This series contains straight-forward fixes for different
 Versatile Express infrastructure drivers:
 
 - NULL pointer dereference on the error path in the clk driver
 - out of boundary array access in the dcscb driver
 - broken restart/power off implementation
 - mis-interpreted voltage unit in the spc driver
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Merge tag 'vexpress/fixes-for-3.15' of git://git.linaro.org/people/pawel.moll/linux into fixes

ARM Versatile Express fixes for 3.15

This series contains straight-forward fixes for different
Versatile Express infrastructure drivers:

- NULL pointer dereference on the error path in the clk driver
- out of boundary array access in the dcscb driver
- broken restart/power off implementation
- mis-interpreted voltage unit in the spc driver

* tag 'vexpress/fixes-for-3.15' of git://git.linaro.org/people/pawel.moll/linux:
  ARM: vexpress/TC2: Convert OPP voltage to uV before storing
  power/reset: vexpress: Fix restart/power off operation
  arm/mach-vexpress: array accessed out of bounds
  clk: vexpress: NULL dereference on error path

Includes an update to 3.15-rc2

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-04-24 23:46:58 +02:00
Grygorii Strashko 2b97789fa2 phy: core: make NULL a valid phy reference if !CONFIG_GENERIC_PHY
This fixes a regression on Keystone 2 platforms caused by patch
57303488cd
"usb: dwc3: adapt dwc3 core to use Generic PHY Framework" which adds
optional support of generic phy in DWC3 core.

On Keystone 2 platforms the USB is not working now because
CONFIG_GENERIC_PHY isn't set and, as result, Generic PHY APIs stubs
return -ENOSYS always. The log shows:
 dwc3 2690000.dwc3: failed to initialize core
 dwc3: probe of 2690000.dwc3 failed with error -38

Hence, fix it by making NULL a valid phy reference in Generic PHY
APIs stubs in the same way as it was done by the patch
04c2facad8 "drivers: phy: Make NULL
a valid phy reference".

Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-24 12:53:38 -07:00
Linus Torvalds 76429f1ded regulator: Fixes for v3.15
A couple of things here:
 
  - Fixes for pbias that didn't make it in during the merge window due to
    the driver coming in via MMC.  The conversion to use helpers is a
    fix as it implements list_voltage() which the main user (MMC) relies
    on for correct functioning.
  - Change the !REGULATOR stub for optional regulators to return an
    error rather than a dummy; this is more in keeping with the intended
    use of optional regulators and fixes some issues seen MMC where it
    got confused by a dummy being provided.
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Merge tag 'regulator-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "A couple of things here:

   - Fixes for pbias that didn't make it in during the merge window due
     to the driver coming in via MMC.  The conversion to use helpers is
     a fix as it implements list_voltage() which the main user (MMC)
     relies on for correct functioning.
   - Change the !REGULATOR stub for optional regulators to return an
     error rather than a dummy; this is more in keeping with the
     intended use of optional regulators and fixes some issues seen MMC
     where it got confused by a dummy being provided"

* tag 'regulator-v3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: core: Return error in get optional stub
  regulator: pbias: Convert to use regmap helper functions
  regulator: pbias: Fix is_enabled callback implementation
2014-04-24 12:01:58 -07:00
Linus Torvalds fdd324aa5f Merge branch 'for-3.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
 "Dan updated tag allocation to accomodate devices which choke when tags
  jump back and forth.  Quite a few ahci MSI related fixes.  A couple
  config dependency fixes and other misc fixes"

* 'for-3.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata/ahci: accommodate tag ordered controllers
  ahci: Do not receive interrupts sent by dummy ports
  ahci: Use pci_enable_msi_exact() instead of pci_enable_msi_range()
  ahci: Ensure "MSI Revert to Single Message" mode is not enforced
  ahci: do not request irq for dummy port
  pata_samsung_cf: fix ata_host_activate() failure handling
  pata_arasan_cf: fix ata_host_activate() failure handling
  ata: fix i.MX AHCI driver dependencies
  pata_at91: fix ata_host_activate() failure handling
  libata: Update queued trim blacklist for M5x0 drives
  libata: make AHCI_XGENE depend on PHY_XGENE
2014-04-24 09:57:02 -07:00
Stephen Warren 9ef1af9ea2 dt: tegra: remove non-existent clock IDs
The Tegra124 clock DT binding currently provides 3 clocks that don't
actually exist; 2 for NAND and one for UART5/UARTE. Delete these. While
this is technically an incompatible DT ABI change, nothing could have
used these clock IDs for anything practical, since the HW doesn't exist.

Cc: <stable@vger.kernel.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2014-04-24 15:37:08 +02:00
Jeff Layton cff2fce58b locks: rename FL_FILE_PVT and IS_FILE_PVT to use "*_OFDLCK" instead
File-private locks have been re-christened as "open file description"
locks.  Finish the symbol name cleanup in the internal implementation.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2014-04-23 16:17:03 -04:00
Linus Torvalds 1aae31c830 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
 "The main change is that we now publish "firmware ID" for the serio
  devices to help userspace figure out the kind of touchpads it is
  dealing with: i8042 will export PS/2 port's PNP IDs as firmware IDs.

  You will also get more quirks for Synaptics touchpads in various
  Lenovo laptops, a change to elantech driver to recognize even more
  models, and fixups to wacom and couple other drivers"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: elantech - add support for newer elantech touchpads
  Input: soc_button_array - fix a crash during rmmod
  Input: synaptics - add min/max quirk for ThinkPad T431s, L440, L540, S1 Yoga and X1
  Input: synaptics - report INPUT_PROP_TOPBUTTONPAD property
  Input: Add INPUT_PROP_TOPBUTTONPAD device property
  Input: i8042 - add firmware_id support
  Input: serio - add firmware_id sysfs attribute
  Input: wacom - handle 1024 pressure levels in wacom_tpc_pen
  Input: wacom - references to 'wacom->data' should use 'unsigned char*'
  Input: wacom - override 'pressure_max' with value from HID_USAGE_PRESSURE
  Input: wacom - use full 32-bit HID Usage value in switch statement
  Input: wacom - missed the last bit of expresskey for DTU-1031
  Input: ads7846 - fix device usage within attribute show
  Input: da9055_onkey - remove use of regmap_irq_get_virq()
2014-04-23 07:48:03 -07:00
Mark Brown 5c437f4241 Merge remote-tracking branch 'regulator/fix/core' into regulator-linus 2014-04-23 13:50:11 +01:00
Jeff Layton 0d3f7a2dd2 locks: rename file-private locks to "open file description locks"
File-private locks have been merged into Linux for v3.15, and *now*
people are commenting that the name and macro definitions for the new
file-private locks suck.

...and I can't even disagree. The names and command macros do suck.

We're going to have to live with these for a long time, so it's
important that we be happy with the names before we're stuck with them.
The consensus on the lists so far is that they should be rechristened as
"open file description locks".

The name isn't a big deal for the kernel, but the command macros are not
visually distinct enough from the traditional POSIX lock macros. The
glibc and documentation folks are recommending that we change them to
look like F_OFD_{GETLK|SETLK|SETLKW}. That lessens the chance that a
programmer will typo one of the commands wrong, and also makes it easier
to spot this difference when reading code.

This patch makes the following changes that I think are necessary before
v3.15 ships:

1) rename the command macros to their new names. These end up in the uapi
   headers and so are part of the external-facing API. It turns out that
   glibc doesn't actually use the fcntl.h uapi header, but it's hard to
   be sure that something else won't. Changing it now is safest.

2) make the the /proc/locks output display these as type "OFDLCK"

Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Carlos O'Donell <carlos@redhat.com>
Cc: Stefan Metzmacher <metze@samba.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Frank Filz <ffilzlnx@mindspring.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2014-04-22 08:23:58 -04:00
Linus Torvalds 9ac0367501 These are regression and bug fixes for ext4.
We had a number of new features in ext4 during this merge window
 (ZERO_RANGE and COLLAPSE_RANGE fallocate modes, renameat, etc.) so
 there were many more regression and bug fixes this time around.  It
 didn't help that xfstests hadn't been fully updated to fully stress
 test COLLAPSE_RANGE until after -rc1.
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "These are regression and bug fixes for ext4.

  We had a number of new features in ext4 during this merge window
  (ZERO_RANGE and COLLAPSE_RANGE fallocate modes, renameat, etc.) so
  there were many more regression and bug fixes this time around.  It
  didn't help that xfstests hadn't been fully updated to fully stress
  test COLLAPSE_RANGE until after -rc1"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (31 commits)
  ext4: disable COLLAPSE_RANGE for bigalloc
  ext4: fix COLLAPSE_RANGE failure with 1KB block size
  ext4: use EINVAL if not a regular file in ext4_collapse_range()
  ext4: enforce we are operating on a regular file in ext4_zero_range()
  ext4: fix extent merging in ext4_ext_shift_path_extents()
  ext4: discard preallocations after removing space
  ext4: no need to truncate pagecache twice in collapse range
  ext4: fix removing status extents in ext4_collapse_range()
  ext4: use filemap_write_and_wait_range() correctly in collapse range
  ext4: use truncate_pagecache() in collapse range
  ext4: remove temporary shim used to merge COLLAPSE_RANGE and ZERO_RANGE
  ext4: fix ext4_count_free_clusters() with EXT4FS_DEBUG and bigalloc enabled
  ext4: always check ext4_ext_find_extent result
  ext4: fix error handling in ext4_ext_shift_extents
  ext4: silence sparse check warning for function ext4_trim_extent
  ext4: COLLAPSE_RANGE only works on extent-based files
  ext4: fix byte order problems introduced by the COLLAPSE_RANGE patches
  ext4: use i_size_read in ext4_unaligned_aio()
  fs: disallow all fallocate operation on active swapfile
  fs: move falloc collapse range check into the filesystem methods
  ...
2014-04-20 20:43:47 -07:00
Hans de Goede f37c013409 Input: Add INPUT_PROP_TOPBUTTONPAD device property
On some newer laptops with a trackpoint the physical buttons for the
trackpoint have been removed to allow for a larger touchpad. On these
laptops the buttonpad has clearly marked areas on the top which are to be
used as trackpad buttons.

Users of the event device-node need to know about this, so that they can
properly interpret BTN_LEFT events as being a left / right / middle click
depending on where on the button pad the clicking finger is.

This commits adds a INPUT_PROP_TOPBUTTONPAD device property which drivers
for such buttonpads will use to signal to the user that this buttonpad not
only has the normal bottom button area, but also a top button area.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-04-19 22:44:13 -07:00
Hans de Goede 0456c66f4e Input: serio - add firmware_id sysfs attribute
serio devices exposed via platform firmware interfaces such as ACPI may
provide additional identifying information of use to userspace.

We don't associate the serio devices with the firmware device (we don't
set it as parent), so there's no way for userspace to make use of this
information.

We cannot change the parent for serio devices instantiated though a
firmware interface as that would break suspend / resume ordering.

Therefore this patch adds a new firmware_id sysfs attribute so that
userspace can get a string from there with any additional identifying
information the firmware interface may provide.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-04-19 22:42:19 -07:00
Linus Torvalds b93124202f Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Unfortunately this contains no easter eggs, its a bit larger than I'd
  like, but I included a patch that just moves code from one file to
  another and I'd like to avoid merge conflicts with that later, so it
  makes it seem worse than it is,

  Otherwise:
   - radeon: fixes to use new microcode to stabilise some cards, use
     some common displayport code, some runtime pm fixes, pll regression
     fixes
   - i915: fix for some context oopses, a warn in a used path, backlight
     fixes
   - nouveau: regression fix
   - omap: a bunch of fixes"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (51 commits)
  drm: bochs: drop unused struct fields
  drm: bochs: add power management support
  drm: cirrus: add power management support
  drm: Split out drm_probe_helper.c from drm_crtc_helper.c
  drm/plane-helper: Don't fake-implement primary plane disabling
  drm/ast: fix value check in cbr_scan2
  drm/nouveau/bios: fix a bit shift error introduced by 457e77b
  drm/radeon/ci: make sure mc ucode is loaded before checking the size
  drm/radeon/si: make sure mc ucode is loaded before checking the size
  drm/radeon: improve PLL params if we don't match exactly v2
  drm/radeon: memory leak on bo reservation failure. v2
  drm/radeon: fix VCE fence command
  drm/radeon: re-enable mclk dpm on R7 260X asics
  drm/radeon: add support for newer mc ucode on CI (v2)
  drm/radeon: add support for newer mc ucode on SI (v2)
  drm/radeon: apply more strict limits for PLL params v2
  drm/radeon: update CI DPM powertune settings
  drm/radeon: fix runpm handling on APUs (v4)
  drm/radeon: disable mclk dpm on R7 260X
  drm/tegra: Remove gratuitous pad field
  ...
2014-04-19 10:35:30 -07:00
Dave Airlie a42892ed10 Merge branch 'drm-next-3.15-wip' of git://people.freedesktop.org/~deathsimple/linux into drm-next
Some i2c fixes over DisplayPort.

* 'drm-next-3.15-wip' of git://people.freedesktop.org/~deathsimple/linux:
  drm/radeon: Improve vramlimit module param documentation
  drm/radeon: fix audio pin counts for DCE6+ (v2)
  drm/radeon/dp: switch to the common i2c over aux code
  drm/dp/i2c: Update comments about common i2c over dp assumptions (v3)
  drm/dp/i2c: send bare addresses to properly reset i2c connections (v4)
  drm/radeon/dp: handle zero sized i2c over aux transactions (v2)
  drm/i915: support address only i2c-over-aux transactions
  drm/tegra: dp: Support address-only I2C-over-AUX transactions
2014-04-19 11:16:02 +10:00
Linus Torvalds ebfc45ee70 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull more networking fixes from David Miller:

 1) Fix mlx4_en_netpoll implementation, it needs to schedule a NAPI
    context, not synchronize it.  From Chris Mason.

 2) Ipv4 flow input interface should never be zero, it should be
    LOOPBACK_IFINDEX instead.  From Cong Wang and Julian Anastasov.

 3) Properly configure MAC to PHY connection in mvneta devices, from
    Thomas Petazzoni.

 4) sys_recv should use SYSCALL_DEFINE.  From Jan Glauber.

 5) Tunnel driver ioctls do not use the correct namespace, fix from
    Nicolas Dichtel.

 6) Fix memory leak on seccomp filter attach, from Kees Cook.

 7) Fix lockdep warning for nested vlans, from Ding Tianhong.

 8) Crashes can happen in SCTP due to how the auth_enable value is
    managed, fix from Vlad Yasevich.

 9) Wireless fixes from John W Linville and co.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (45 commits)
  net: sctp: cache auth_enable per endpoint
  tg3: update rx_jumbo_pending ring param only when jumbo frames are enabled
  vlan: Fix lockdep warning when vlan dev handle notification
  seccomp: fix memory leak on filter attach
  isdn: icn: buffer overflow in icn_command()
  ip6_tunnel: use the right netns in ioctl handler
  sit: use the right netns in ioctl handler
  ip_tunnel: use the right netns in ioctl handler
  net: use SYSCALL_DEFINEx for sys_recv
  net: mdio-gpio: Add support for separate MDI and MDO gpio pins
  net: mdio-gpio: Add support for active low gpio pins
  net: mdio-gpio: Use devm_ functions where possible
  ipv4, route: pass 0 instead of LOOPBACK_IFINDEX to fib_validate_source()
  ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
  mlx4_en: don't use napi_synchronize inside mlx4_en_netpoll
  net: mvneta: properly configure the MAC <-> PHY connection in all situations
  net: phy: add minimal support for QSGMII PHY
  sfc:On MCDI timeout, issue an FLR (and mark MCDI to fail-fast)
  mwifiex: fix hung task on command timeout
  mwifiex: process event before command response
  ...
2014-04-18 17:53:46 -07:00
Linus Torvalds 25bfe4f5f1 Char/Misc driver fixes for 3.15-rc2
Here are a few driver fixes for char/misc drivers that resolve reported
 issues.
 
 All have been in linux-next successfully for a few days.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are a few driver fixes for char/misc drivers that resolve
  reported issues.

  All have been in linux-next successfully for a few days"

* tag 'char-misc-3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  Drivers: hv: vmbus: Negotiate version 3.0 when running on ws2012r2 hosts
  Tools: hv: Handle the case when the target file exists correctly
  vme_tsi148: Utilize to_pci_dev() macro
  vme_tsi148: Fix PCI address mapping assumption
  vme_tsi148: Fix typo in tsi148_slave_get()
  w1: avoid recursive device_add
  w1: fix netlink refcnt leak on error path
  misc: Grammar s/addition/additional/
  drivers: mcb: fix memory leak in chameleon_parse_cells() error path
  mei: ignore client writing state during cb completion
  mei: me: do not load the driver if the FW doesn't support MEI interface
  GenWQE: Increase driver version number
  GenWQE: Fix multithreading problems
  GenWQE: Ensure rc is not returning an uninitialized value
  GenWQE: Add wmb before DDCB is started
  GenWQE: Enable access to VPD flash area
2014-04-18 17:02:35 -07:00
Linus Torvalds 60fbf2bda1 driver core fixes for 3.15-rc2
Here are some driver core fixes for 3.15-rc2.  Also in here are some
 documentation updates, as well as an API removal that had to wait for
 after -rc1 due to the cleanups coming into you from multiple developer
 trees (this one and the PPC tree.)
 
 All have been in linux next successfully.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fixes from Greg KH:
 "Here are some driver core fixes for 3.15-rc2.  Also in here are some
  documentation updates, as well as an API removal that had to wait for
  after -rc1 due to the cleanups coming into you from multiple developer
  trees (this one and the PPC tree.)

  All have been in linux next successfully"

* tag 'driver-core-3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  drivers/base/dd.c incorrect pr_debug() parameters
  Documentation: Update stable address in Chinese and Japanese translations
  topology: Fix compilation warning when not in SMP
  Chinese: add translation of io_ordering.txt
  stable_kernel_rules: spelling/word usage
  sysfs, driver-core: remove unused {sysfs|device}_schedule_callback_owner()
  kernfs: protect lazy kernfs_iattrs allocation with mutex
  fs: Don't return 0 from get_anon_bdev
2014-04-18 16:59:52 -07:00
Linus Torvalds ea2388f281 Merge branch 'akpm' (incoming from Andrew)
Merge misc fixes from Andrew Morton:
 "13 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  thp: close race between split and zap huge pages
  mm: fix new kernel-doc warning in filemap.c
  mm: fix CONFIG_DEBUG_VM_RB description
  mm: use paravirt friendly ops for NUMA hinting ptes
  mips: export flush_icache_range
  mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()
  wait: explain the shadowing and type inconsistencies
  Shiraz has moved
  Documentation/vm/numa_memory_policy.txt: fix wrong document in numa_memory_policy.txt
  powerpc/mm: fix ".__node_distance" undefined
  kernel/watchdog.c:touch_softlockup_watchdog(): use raw_cpu_write()
  init/Kconfig: move the trusted keyring config option to general setup
  vmscan: reclaim_clean_pages_from_list() must use mod_zone_page_state()
2014-04-18 16:40:31 -07:00
Mel Gorman 29c7787075 mm: use paravirt friendly ops for NUMA hinting ptes
David Vrabel identified a regression when using automatic NUMA balancing
under Xen whereby page table entries were getting corrupted due to the
use of native PTE operations.  Quoting him

	Xen PV guest page tables require that their entries use machine
	addresses if the preset bit (_PAGE_PRESENT) is set, and (for
	successful migration) non-present PTEs must use pseudo-physical
	addresses.  This is because on migration MFNs in present PTEs are
	translated to PFNs (canonicalised) so they may be translated back
	to the new MFN in the destination domain (uncanonicalised).

	pte_mknonnuma(), pmd_mknonnuma(), pte_mknuma() and pmd_mknuma()
	set and clear the _PAGE_PRESENT bit using pte_set_flags(),
	pte_clear_flags(), etc.

	In a Xen PV guest, these functions must translate MFNs to PFNs
	when clearing _PAGE_PRESENT and translate PFNs to MFNs when setting
	_PAGE_PRESENT.

His suggested fix converted p[te|md]_[set|clear]_flags to using
paravirt-friendly ops but this is overkill.  He suggested an alternative
of using p[te|md]_modify in the NUMA page table operations but this is
does more work than necessary and would require looking up a VMA for
protections.

This patch modifies the NUMA page table operations to use paravirt
friendly operations to set/clear the flags of interest.  Unfortunately
this will take a performance hit when updating the PTEs on
CONFIG_PARAVIRT but I do not see a way around it that does not break
Xen.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: David Vrabel <david.vrabel@citrix.com>
Tested-by: David Vrabel <david.vrabel@citrix.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Steven Noonan <steven@uplinklabs.net>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-18 16:40:09 -07:00
Peter Zijlstra 8b32201de1 wait: explain the shadowing and type inconsistencies
Stick in a comment before someone else tries to fix the sparse warning
this generates.

Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-o2ro6f3vkxklni0bc8f7m68s@git.kernel.org
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-18 16:40:08 -07:00
Viresh Kumar 9cc236827f Shiraz has moved
shiraz.hashim@st.com email-id doesn't exist anymore as he has left the
company.  Replace ST's id with shiraz.linux.kernel@gmail.com.

It also updates .mailmap file to fix address for 'git shortlog'.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Shiraz Hashim <shiraz.linux.kernel@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-18 16:40:08 -07:00
Vlad Yasevich b14878ccb7 net: sctp: cache auth_enable per endpoint
Currently, it is possible to create an SCTP socket, then switch
auth_enable via sysctl setting to 1 and crash the system on connect:

Oops[#1]:
CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.1-mipsgit-20140415 #1
task: ffffffff8056ce80 ti: ffffffff8055c000 task.ti: ffffffff8055c000
[...]
Call Trace:
[<ffffffff8043c4e8>] sctp_auth_asoc_set_default_hmac+0x68/0x80
[<ffffffff8042b300>] sctp_process_init+0x5e0/0x8a4
[<ffffffff8042188c>] sctp_sf_do_5_1B_init+0x234/0x34c
[<ffffffff804228c8>] sctp_do_sm+0xb4/0x1e8
[<ffffffff80425a08>] sctp_endpoint_bh_rcv+0x1c4/0x214
[<ffffffff8043af68>] sctp_rcv+0x588/0x630
[<ffffffff8043e8e8>] sctp6_rcv+0x10/0x24
[<ffffffff803acb50>] ip6_input+0x2c0/0x440
[<ffffffff8030fc00>] __netif_receive_skb_core+0x4a8/0x564
[<ffffffff80310650>] process_backlog+0xb4/0x18c
[<ffffffff80313cbc>] net_rx_action+0x12c/0x210
[<ffffffff80034254>] __do_softirq+0x17c/0x2ac
[<ffffffff800345e0>] irq_exit+0x54/0xb0
[<ffffffff800075a4>] ret_from_irq+0x0/0x4
[<ffffffff800090ec>] rm7k_wait_irqoff+0x24/0x48
[<ffffffff8005e388>] cpu_startup_entry+0xc0/0x148
[<ffffffff805a88b0>] start_kernel+0x37c/0x398
Code: dd0900b8  000330f8  0126302d <dcc60000> 50c0fff1  0047182a  a48306a0
03e00008  00000000
---[ end trace b530b0551467f2fd ]---
Kernel panic - not syncing: Fatal exception in interrupt

What happens while auth_enable=0 in that case is, that
ep->auth_hmacs is initialized to NULL in sctp_auth_init_hmacs()
when endpoint is being created.

After that point, if an admin switches over to auth_enable=1,
the machine can crash due to NULL pointer dereference during
reception of an INIT chunk. When we enter sctp_process_init()
via sctp_sf_do_5_1B_init() in order to respond to an INIT chunk,
the INIT verification succeeds and while we walk and process
all INIT params via sctp_process_param() we find that
net->sctp.auth_enable is set, therefore do not fall through,
but invoke sctp_auth_asoc_set_default_hmac() instead, and thus,
dereference what we have set to NULL during endpoint
initialization phase.

The fix is to make auth_enable immutable by caching its value
during endpoint initialization, so that its original value is
being carried along until destruction. The bug seems to originate
from the very first days.

Fix in joint work with Daniel Borkmann.

Reported-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Tested-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-18 18:32:00 -04:00
Linus Torvalds 38137a5188 InfiniBand/RDMA updates for 3.15-rc2:
- Mostly cxgb4 fixes unblocked by the merge of some prerequisites via
    the net tree.
 
  - Drop deprecated MSI-X API use.
 
  - A couple other miscellaneous things.
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull infiniband/rdma updates from Roland Dreier:

 - mostly cxgb4 fixes unblocked by the merge of some prerequisites via
   the net tree

 - drop deprecated MSI-X API use.

 - a couple other miscellaneous things.

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  RDMA/cxgb4: Fix over-dereference when terminating
  RDMA/cxgb4: Use uninitialized_var()
  RDMA/cxgb4: Add missing debug stats
  RDMA/cxgb4: Initialize reserved fields in a FW work request
  RDMA/cxgb4: Use pr_warn_ratelimited
  RDMA/cxgb4: Max fastreg depth depends on DSGL support
  RDMA/cxgb4: SQ flush fix
  RDMA/cxgb4: rmb() after reading valid gen bit
  RDMA/cxgb4: Endpoint timeout fixes
  RDMA/cxgb4: Use the BAR2/WC path for kernel QPs and T5 devices
  IB/mlx5: Add block multicast loopback support
  IB/mthca: Use pci_enable_msix_exact() instead of pci_enable_msix()
  IB/qib: Use pci_enable_msix_range() instead of pci_enable_msix()
2014-04-18 13:49:42 -07:00
Dan Williams 8a4aeec8d2 libata/ahci: accommodate tag ordered controllers
The AHCI spec allows implementations to issue commands in tag order
rather than FIFO order:

	5.3.2.12 P:SelectCmd
	HBA sets pSlotLoc = (pSlotLoc + 1) mod (CAP.NCS + 1)
	or HBA selects the command to issue that has had the
	PxCI bit set to '1' longer than any other command
	pending to be issued.

The result is that commands posted sequentially (time-wise) may play out
of sequence when issued by hardware.

This behavior has likely been hidden by drives that arrange for commands
to complete in issue order.  However, it appears recent drives (two from
different vendors that we have found so far) inflict out-of-order
completions as a matter of course.  So, we need to take care to maintain
ordered submission, otherwise we risk triggering a drive to fall out of
sequential-io automation and back to random-io processing, which incurs
large latency and degrades throughput.

This issue was found in simple benchmarks where QD=2 seq-write
performance was 30-50% *greater* than QD=32 seq-write performance.

Tagging for -stable and making the change globally since it has a low
risk-to-reward ratio.  Also, word is that recent versions of an unnamed
OS also does it this way now.  So, drives in the field are already
experienced with this tag ordering scheme.

Cc: <stable@vger.kernel.org>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Ed Ciechanowski <ed.ciechanowski@intel.com>
Reviewed-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2014-04-18 15:56:03 -04:00
Linus Torvalds 345ef87b37 Devicetree fixes for 3.15:
- Fix error handling in of_update_property
 - Fix section mismatch warnings in __reserved_mem_check_root
 - Add empty of_find_node_by_path for !OF builds
 - Add various missing binding documentation
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Merge tag 'dt-fixes-for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:
 - fix error handling in of_update_property
 - fix section mismatch warnings in __reserved_mem_check_root
 - add empty of_find_node_by_path for !OF builds
 - add various missing binding documentation

* tag 'dt-fixes-for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of: add empty of_find_node_by_path() for !OF
  of: Clean up of_update_property
  DT: add vendor prefix for EBV Elektronik
  of: Fix the section mismatch warnings.
  of: Add vendor prefix for Digi International Inc.
  DT: I2C: Add trivial bindings used by kirkwood boards
  DT: Vendor: Add prefixes used by Kirkwood devices
  DT: bindings: add missing Marvell Kirkwood SoC documentation
  dt-bindings: add vendor-prefix for Newhaven Display
  of: add vendor prefix for I2SE GmbH
  of: add vendor prefix for ISEE 2007 S.L.
2014-04-18 10:19:01 -07:00
Tim Kryger df7926fffa regulator: core: Return error in get optional stub
Drivers that call regulator_get_optional are tolerant to the absence of
that regulator.  By modifying the value returned from the stub function
to match that seen when a regulator isn't present, callers can wrap the
regulator logic with an IS_ERR based conditional even if they happen to
call regulator_is_supported_voltage.  This improves efficiency as well
as eliminates the possibility for a very subtle bug.

Signed-off-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-04-18 15:11:54 +01:00
Alexander Shiyan 20cd477c39 of: add empty of_find_node_by_path() for !OF
Add an empty version of of_find_node_by_path().
This fixes following build error for asoc tree:
sound/soc/fsl/fsl_ssi.c: In function 'fsl_ssi_probe':
sound/soc/fsl/fsl_ssi.c:1471:2: error: implicit declaration of function 'of_find_node_by_path' [-Werror=implicit-function-declaration]
  sprop = of_get_property(of_find_node_by_path("/"), "compatible", NULL);

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Rob Herring <robh@kernel.org>
2014-04-18 08:36:10 -05:00
Daniel Vetter 8d75454420 drm: Split out drm_probe_helper.c from drm_crtc_helper.c
This is leftover stuff from my previous doc round which I kinda wanted
to do but didn't yet due to rebase hell.

The modeset helpers and the probing helpers a independent and e.g.
i915 uses the probing stuff but has its own modeset infrastructure. It
hence makes to split this up. While at it add a DOC: comment for the
probing libraray.

It would be rather neat to pull some of the DocBook documenting these
two helpers into in-line DOC: comments. But unfortunately kerneldoc
doesn't support markdown or something similar to make nice-looking
documentation, so the current state is better.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2014-04-18 13:21:17 +10:00
Thomas Gleixner 01f8fa4f01 genirq: Allow forcing cpu affinity of interrupts
The current implementation of irq_set_affinity() refuses rightfully to
route an interrupt to an offline cpu.

But there is a special case, where this is actually desired. Some of
the ARM SoCs have per cpu timers which require setting the affinity
during cpu startup where the cpu is not yet in the online mask.

If we can't do that, then the local timer interrupt for the about to
become online cpu is routed to some random online cpu.

The developers of the affected machines tried to work around that
issue, but that results in a massive mess in that timer code.

We have a yet unused argument in the set_affinity callbacks of the irq
chips, which I added back then for a similar reason. It was never
required so it got not used. But I'm happy that I never removed it.

That allows us to implement a sane handling of the above scenario. So
the affected SoC drivers can add the required force handling to their
interrupt chip, switch the timer code to irq_force_affinity() and
things just work.

This does not affect any existing user of irq_set_affinity().

Tagged for stable to allow a simple fix of the affected SoC clock
event drivers.

Reported-and-tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Tomasz Figa <t.figa@samsung.com>,
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>,
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org,
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20140416143315.717251504@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-04-17 23:36:27 +02:00
Linus Torvalds c2896def97 Merge branch 'ipmi' (emailed ipmi fixes)
Merge ipmi fixes from Corey Minyard:
 "Things collected since last kernel release.

  Some of these are pretty important.  The first three are bug fixes.
  The next two are to hopefully make everyone happy about allowing
  ACPI to be on all the time and not have IPMI have an effect on the
  system when not in use.  The last is a little cleanup"

* emailed patches from Corey Minyard <cminyard@mvista.com>:
  ipmi: boolify some things
  ipmi: Turn off all activity on an idle ipmi interface
  ipmi: Turn off default probing of interfaces
  ipmi: Reset the KCS timeout when starting error recovery
  ipmi: Fix a race restarting the timer
  Char: ipmi_bt_sm, fix infinite loop
2014-04-17 12:31:07 -07:00
Corey Minyard 7aefac26fc ipmi: boolify some things
Convert some ints to bools.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-17 12:30:40 -07:00
Corey Minyard 89986496de ipmi: Turn off all activity on an idle ipmi interface
The IPMI driver would wake up periodically looking for events and
watchdog pretimeouts.  If there is nothing waiting for these events,
it's really kind of pointless to be checking for them.  So modify the
driver so the message handler can pass down if it needs the lower layer
to be waiting for these.  Modify the system interface lower layer to
turn off all timer and thread activity if the upper layer doesn't need
anything and it is not currently handling messages.  And modify the
message handler to not restart the timer if its timer is not needed.

The timers and kthread will still be enabled if:
 - the SI interface is handling a message.
 - a user has enabled watching for events.
 - the IPMI watchdog timer is in use (since it uses pretimeouts).
 - the message handler is waiting on a remote response.
 - a user has registered to receive commands.

This mostly affects interfaces without interrupts.  Interfaces with
interrupts already don't use CPU in the system interface when the
interface is idle.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-17 12:23:07 -07:00
Linus Torvalds 6ca2a88ad8 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Various fixes:

   - reboot regression fix
   - build message spam fix
   - GPU quirk fix
   - 'make kvmconfig' fix

  plus the wire-up of the renameat2() system call on i386"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Remove the PCI reboot method from the default chain
  x86/build: Supress "Nothing to be done for ..." messages
  x86/gpu: Fix sign extension issue in Intel graphics stolen memory quirks
  x86/platform: Fix "make O=dir kvmconfig"
  i386: Wire up the renameat2() syscall
2014-04-16 16:40:18 -07:00
K. Y. Srinivasan 03367ef5ea Drivers: hv: vmbus: Negotiate version 3.0 when running on ws2012r2 hosts
Only ws2012r2 hosts support the ability to reconnect to the host on VMBUS. This functionality
is needed by kexec in Linux. To use this functionality we need to negotiate version 3.0 of the
VMBUS protocol.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>        [3.9+]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-16 14:14:07 -07:00
K. Y. Srinivasan 314672a2c2 Tools: hv: Handle the case when the target file exists correctly
Return the appropriate error code and handle the case when the target
file exists correctly. This fixes a bug.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org> [3.14]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-16 14:10:36 -07:00
Guenter Roeck f1d54c4750 net: mdio-gpio: Add support for separate MDI and MDO gpio pins
This is for a system with fixed assignments of input and output pins
(various variants of Kontron COMe).

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:09:51 -04:00
Guenter Roeck 1d2514818a net: mdio-gpio: Add support for active low gpio pins
Some systems using mdio-gpio may use active-low gpio pins
(eg with inverters or FETs connected to all or some of the
gpio pins).

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:09:51 -04:00
Cong Wang 6a662719c9 ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
As suggested by Julian:

	Simply, flowi4_iif must not contain 0, it does not
	look logical to ignore all ip rules with specified iif.

because in fib_rule_match() we do:

        if (rule->iifindex && (rule->iifindex != fl->flowi_iif))
                goto out;

flowi4_iif should be LOOPBACK_IFINDEX by default.

We need to move LOOPBACK_IFINDEX to include/net/flow.h:

1) It is mostly used by flowi_iif

2) Fix the following compile error if we use it in flow.h
by the patches latter:

In file included from include/linux/netfilter.h:277:0,
                 from include/net/netns/netfilter.h:5,
                 from include/net/net_namespace.h:21,
                 from include/linux/netdevice.h:43,
                 from include/linux/icmpv6.h:12,
                 from include/linux/ipv6.h:61,
                 from include/net/ipv6.h:16,
                 from include/linux/sunrpc/clnt.h:27,
                 from include/linux/nfs_fs.h:30,
                 from init/do_mounts.c:32:
include/net/flow.h: In function ‘flowi4_init_output’:
include/net/flow.h:84:32: error: ‘LOOPBACK_IFINDEX’ undeclared (first use in this function)

Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Julian Anastasov <ja@ssi.bg>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 15:05:11 -04:00
Tejun Heo 33ac1257ff sysfs, driver-core: remove unused {sysfs|device}_schedule_callback_owner()
All device_schedule_callback_owner() users are converted to use
device_remove_file_self().  Remove now unused
{sysfs|device}_schedule_callback_owner().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-16 11:56:33 -07:00
Thomas Petazzoni b9d12085f2 net: phy: add minimal support for QSGMII PHY
This commit adds the necessary definitions for the PHY layer to
recognize "qsgmii" as a valid PHY interface. A QSMII interface, as
defined at
http://en.wikipedia.org/wiki/Media_Independent_Interface#Quad_Serial_Gigabit_Media_Independent_Interface,
is "is a method of combining four SGMII lines into a 5Gbit/s
interface. QSGMII, like SGMII, uses LVDS signalling for the TX and RX
data and a single LVDS clock signal. QSGMII uses significantly fewer
signal lines than four SGMII busses."

This type of MAC <-> PHY connection might require special handling on
the MAC driver side, so it should be possible to express this type of
MAC <-> PHY connection, for example in the Device Tree.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: devicetree@vger.kernel.org
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-04-16 14:36:12 -04:00
Thierry Reding cbfbbabb89 drm/tegra: Remove gratuitous pad field
The version of the drm_tegra_submit structure that was merged all the
way back in 3.10 contains a pad field that was originally intended to
properly pad the following __u64 field. Unfortunately it seems like a
different field was dropped during review that caused this padding to
become unnecessary, but the pad field wasn't removed at that time.

One possible side-effect of this is that since the __u64 following the
pad is now no longer properly aligned, the compiler may (or may not)
introduce padding itself, which results in no predictable ABI.

Rectify this by removing the pad field so that all fields are again
naturally aligned. Technically this is breaking existing userspace ABI,
but given that there aren't any (released) userspace drivers that make
use of this yet, the fallout should be minimal.

Fixes: d43f81cbaf ("drm/tegra: Add gr2d device")
Cc: <stable@vger.kernel.org> # 3.10
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-04-16 17:11:04 +02:00
Ingo Molnar 5be44a6fb1 x86: Remove the PCI reboot method from the default chain
Steve reported a reboot hang and bisected it back to this commit:

  a4f1987e4c x86, reboot: Add EFI and CF9 reboot methods into the default list

He heroically tested all reboot methods and found the following:

  reboot=t       # triple fault                  ok
  reboot=k       # keyboard ctrl                 FAIL
  reboot=b       # BIOS                          ok
  reboot=a       # ACPI                          FAIL
  reboot=e       # EFI                           FAIL   [system has no EFI]
  reboot=p       # PCI 0xcf9                     FAIL

And I think it's pretty obvious that we should only try PCI 0xcf9 as a
last resort - if at all.

The other observation is that (on this box) we should never try
the PCI reboot method, but close with either the 'triple fault'
or the 'BIOS' (terminal!) reboot methods.

Thirdly, CF9_COND is a total misnomer - it should be something like
CF9_SAFE or CF9_CAREFUL, and 'CF9' should be 'CF9_FORCE' ...

So this patch fixes the worst problems:

 - it orders the actual reboot logic to follow the reboot ordering
   pattern - it was in a pretty random order before for no good
   reason.

 - it fixes the CF9 misnomers and uses BOOT_CF9_FORCE and
   BOOT_CF9_SAFE flags to make the code more obvious.

 - it tries the BIOS reboot method before the PCI reboot method.
   (Since 'BIOS' is a terminal reboot method resulting in a hang
    if it does not work, this is essentially equivalent to removing
    the PCI reboot method from the default reboot chain.)

 - just for the miraculous possibility of terminal (resulting
   in hang) reboot methods of triple fault or BIOS returning
   without having done their job, there's an ordering between
   them as well.

Reported-and-bisected-and-tested-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Li Aubrey <aubrey.li@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Link: http://lkml.kernel.org/r/20140404064120.GB11877@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-04-16 08:56:09 +02:00
Linus Torvalds 10ec34fcb1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix BPF filter validation of netlink attribute accesses, from
    Mathias Kruase.

 2) Netfilter conntrack generation seqcount not initialized properly,
    from Andrey Vagin.

 3) Fix comparison mask computation on big-endian in nft_cmp_fast(),
    from Patrick McHardy.

 4) Properly limit MTU over ipv6, from Eric Dumazet.

 5) Fix seccomp system call argument population on 32-bit, from Daniel
    Borkmann.

 6) skb_network_protocol() should not use hard-coded ETH_HLEN, instead
    skb->mac_len needs to be used.  From Vlad Yasevich.

 7) We have several cases of using socket based communications to
    implement a tunnel.  For example, some tunnels are encapsulations
    over UDP so we use an internal kernel UDP socket to do the
    transmits.

    These tunnels should behave just like other software devices and
    pass the packets on down to the next layer.

    Most importantly we want the top-level socket (eg TCP) that created
    the traffic to be charged for the SKB memory.

    However, once you get into the IP output path, we have code that
    assumed that whatever was attached to skb->sk is an IP socket.

    To keep the top-level socket being charged for the SKB memory,
    whilst satisfying the needs of the IP output path, we now pass in an
    explicit 'sk' argument.

    From Eric Dumazet.

 8) ping_init_sock() leaks group info, from Xiaoming Wang.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (33 commits)
  cxgb4: use the correct max size for firmware flash
  qlcnic: Fix MSI-X initialization code
  ip6_gre: don't allow to remove the fb_tunnel_dev
  ipv4: add a sock pointer to dst->output() path.
  ipv4: add a sock pointer to ip_queue_xmit()
  driver/net: cosa driver uses udelay incorrectly
  at86rf230: fix __at86rf230_read_subreg function
  at86rf230: remove check if AVDD settled
  net: cadence: Add architecture dependencies
  net: Start with correct mac_len in skb_network_protocol
  Revert "net: sctp: Fix a_rwnd/rwnd management to reflect real state of the receiver's buffer"
  cxgb4: Save the correct mac addr for hw-loopback connections in the L2T
  net: filter: seccomp: fix wrong decoding of BPF_S_ANC_SECCOMP_LD_W
  seccomp: fix populating a0-a5 syscall args in 32-bit x86 BPF
  qlcnic: Do not disable SR-IOV when VFs are assigned to VMs
  qlcnic: Fix QLogic application/driver interface for virtual NIC configuration
  qlcnic: Fix PVID configuration on eSwitch port.
  qlcnic: Fix max ring count calculation
  qlcnic: Fix to send INIT_NIC_FUNC as first mailbox.
  qlcnic: Fix panic due to uninitialzed delayed_work struct in use.
  ...
2014-04-15 20:30:30 -07:00