If we don't need a huge amount of memory in ->readdir() then
we can use kmalloc rather than vmalloc to allocate it. This
should cut down on the greater overheads associated with
vmalloc for smaller directories.
We may be able to eliminate vmalloc entirely at some stage,
but this is easy to do right away.
Also using GFP_NOFS to avoid any issues wrt to deleting inodes
while under a glock, and suggestion from Linus to factor out
the alloc/dealloc.
I've given this a test with a variety of different sized
directories and it seems to work ok.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Enable PC-beep as default for hardwares that aren't compliant with the
SSID value Realtek requires. In such a case, better to enable the beep
to avoid a regression.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
We check now the availability of PC beep and skip the build of beep
mixers, but the driver still registers the input device. This should
be checked as well.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Per the da850/omap-l138 Beta EVM SOM schematic, the DEFDCDC2 and
DEFDCDC3 lines are tied high. This leads to a 3.3V IO and 1.2V CVDD
voltage.
Pass the right platform data to the TPS6507x driver so it can operate
on the DEFDCDC{2,3}_HIGH register to read and change voltage levels.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
In TPS6507x, depending on the status of DEFDCDC{2,3} pin either
DEFDCDC{2,3}_LOW or DEFDCDC{2,3}_HIGH register needs to be read or
programmed to change the output voltage.
The current driver assumes DEFDCDC{2,3} pins are always tied low
and thus operates only on DEFDCDC{2,3}_LOW register. This need
not always be the case (as is found on OMAP-L138 EVM).
Unfortunately, software cannot read the status of DEFDCDC{2,3} pins.
So, this information is passed through platform data depending on
how the board is wired.
Signed-off-by: Anuj Aggarwal <anuj.aggarwal@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
The behavior of Nvidia HDMI codec regarding the pin-detection unsol events
is based on the old HD-audio spec, i.e. PD bit indicates only the update
and doesn't show the current state. Since the current code assumes the
new behavior, the pin-detection doesn't work relialby with these h/w.
This patch adds a flag for indicating the old spec, and fixes the issue
by checking the pin-detection explicitly for such hardware.
Tested-by: Wei Ni <wni@nvidia.com>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
When freeing a gpio that has not been exported, gpio_unexport() prints a
debug message when it should just fall through silently.
Example spurious message:
gpio_unexport: gpio0 status -22
Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Uwe Kleine-K?nig <u.kleine-koenig@pengutronix.de>
Cc: Gregory Bean <gbean@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The MPC85xx EDAC driver is missing module device aliases, so the driver
won't load automatically on boot. This patch fixes the issue by adding
proper MODULE_DEVICE_TABLE() macros.
Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Dave Jiang <djiang@mvista.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fix the logic while writing new date/time to the chip. The driver
incorrectly wrote back register values to different registers and even
with wrong mask. The patch adds clearing of the VLF register, which
should be cleared if all date/time values are set.
Signed-off-by: Rudolf Marek <rudolf.marek@sysgo.com>
Acked-by: Wan ZongShun <mcuos.com@gmail.com>
Cc: Martyn Welch <martyn.welch@gefanuc.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The command
echo "file ec.c +p" >/sys/kernel/debug/dynamic_debug/control
causes an oops.
Move the call to ddebug_remove_module() down into free_module(). In this
way it should be called from all error paths. Currently, we are missing
the remove if the module init routine fails.
Signed-off-by: Jason Baron <jbaron@redhat.com>
Reported-by: Thomas Renninger <trenn@suse.de>
Tested-by: Thomas Renninger <trenn@suse.de>
Cc: <stable@kernel.org> [2.6.32+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This fixes an issue triggered by running concurrent syncs. One of the syncs
would go through while the other would just hang indefinitely. In any case, we
never actually want to wake a single waiter, so the *_all functions should
be used.
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
Pass the correct end of the buffer to p9stat_read.
Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
The etr events switch-to-local and sync-check disable the synchronous clock
and schedule a work queue that tries to get the clock back into sync.
If another switch-to-local or sync-check event occurs while the work queue
function etr_work_fn still runs the eacr.es bit and the clock_sync_word can
become inconsistent because check_sync_clock only uses the clock_sync_word
to determine if the clock is in sync or not. The second pass of the
etr_work_fn will reset the eacr.es bit but will leave the clock_sync_word
intact. Fix this race by moving the reset of the eacr.es bit into the
switch-to-local and sync-check functions and by checking the eacr.es bit
as well to decide if the clock needs to be synced.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
In case user space is single stepped (PER) the program check handler
claims too early that IRQs are enabled on the return path.
Subsequent checks will notice that the IRQ mask in the PSW and
what lockdep thinks the IRQ mask should be do not correlate and
therefore will print a warning to the console and disable lockdep.
Fix this by doing all the work within the correct context.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
A driver needs to be ready to take an interrupt as soon as it registers
an interrupt handler. I noticed the following oops when testing kdump:
ipr: IBM Power RAID SCSI Device Driver version: 2.5.0 (February 11, 2010)
ibmvscsi 30000002: SRP_VERSION: 16.a
ibmvscsi 30000002: SRP_VERSION: 16.a
Unable to handle kernel paging request for data at address 0x00000000
...
pc: c000000004085e34: .tasklet_action+0xf4/0x1dc
...
c000000004086fe4 .__do_softirq+0x16c/0x2c0
c00000000403138c .call_do_softirq+0x14/0x24
c00000000400ee14 .do_softirq+0xa0/0x104
c00000000408690c .irq_exit+0x70/0xd0
c00000000400f190 .do_IRQ+0x214/0x2a8
c000000004004804 hardware_interrupt_entry+0x1c/0x98
--- Exception: 501 (Hardware Interrupt) at c00000000400c544 .raw_local_irq_restore+0x48/0x54
c00000000465d2a8 ._raw_spin_unlock_irqrestore+0x74/0xa0
c0000000040e7f00 .__setup_irq+0x2ec/0x3f0
c0000000040e8198 .request_threaded_irq+0x194/0x22c
c00000000446d854 .rpavscsi_init_crq_queue+0x284/0x3f0
c00000000446c764 .ibmvscsi_probe+0x688/0x710
c00000000402903c .vio_bus_probe+0x37c/0x3e4
c000000004403f10 .driver_probe_device+0xec/0x1b8
c000000004404088 .__driver_attach+0xac/0xf4
c000000004403184 .bus_for_each_dev+0x98/0x104
c000000004403c98 .driver_attach+0x40/0x60
c0000000044026f0 .bus_add_driver+0x154/0x324
c0000000044045d0 .driver_register+0xe8/0x1ac
c00000000402b2a8 .vio_register_driver+0x54/0x74
c000000004933ea4 .ibmvscsi_module_init+0x80/0xc0
c000000004009834 .do_one_initcall+0x98/0x1d8
c0000000049005b4 .kernel_init+0x27c/0x33c
c000000004031550 .kernel_thread+0x54/0x70
srp_task needs to be setup before request_irq. The patch below fixes the oops.
Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
s2io: fixing DBG_PRINT() macro
ath9k: fix dma direction for map/unmap in ath_rx_tasklet
net: dev_forward_skb should call nf_reset
net sched: fix race in mirred device removal
tun: avoid BUG, dump packet on GSO errors
bonding: set device in RLB ARP packet handler
wimax/i2400m: Add PID & VID for Intel WiMAX 6250
ipv6: Don't add routes to ipv6 disabled interfaces.
net: Fix skb_copy_expand() handling of ->csum_start
net: Fix corruption of skb csum field in pskb_expand_head() of net/core/skbuff.c
macvtap: Limit packet queue length
ixgbe/igb: catch invalid VF settings
bnx2x: Advance a module version
bnx2x: Protect statistics ramrod and sequence number
bnx2x: Protect a SM state change
wireless: use netif_rx_ni in ieee80211_send_layer2_update
We should use perf_sample_data_init() to initialize struct
perf_sample_data. As explained in the description of commit dc1d628a
("perf: Provide generic perf_sample_data initialization"), it is
possible for userspace to get the kernel to dereference data.raw,
so if it is not initialized, that means that unprivileged userspace
can possibly oops the kernel. Using perf_sample_data_init makes sure
it gets initialized to NULL.
This conversion should have been included in commit dc1d628a, but it
got missed.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
In the case of platform_device_add() fail, we should call
platform_device_put() instead of platform_device_del()
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
We use voltage selector as an array index for typ_voltages.
Thus the valid range for voltage selector should be 0..voltages_len-1.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Since version 0.3 from Kristian's repository, there should actually be
no change in functionality except for the x86-64 fix. Nevertheless,
make it distinct from the original nosy-dump --- just in case and also
because of potential future changes.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This changes only
- whitespace
- C99 initializers
- comment style
- order of #includes
- if { } else { } bracing
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
If I run "nosy-dump --view=transaction" with my camcorder on battery
instead of mains, it segfaults very quickly because of !t->request.
Perhaps this is because of increased likelyhood of incomplete
transactions (ack_busy when host writes to camcorder's FCP_Request)
and a bug deeper in nosy-dump's transaction housekeeping. This is a
quick workaround to get me going.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Replace 'unsigned long' and the (unaffected) 'unsigned int' by uint32_t
if they represent quadlets.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This adds nosy-dump, the userspace part of nosy, the IEEE 1394 traffic
sniffer for Texas Instruments PCILynx/ PCILynx2 based cards. Author is
Kristian Høgsberg.
The files added here are taken from
git://anongit.freedesktop.org/~krh/nosy commit ee29be97 (2009-11-10)
with the following changes by Stefan Richter:
- Parts pertaining to the kernel module removed from Makefile.
- dist target removed from the Makefile.
- Mentioned nosy-dump in the Kconfig help to nosy's kernel component.
- Add copyright notice to nosy-dump.c. This is a duplicate of the
respective notice in the kernel component nosy.c except for a time
span of 2002 - 2006, according to Kristian's git log.
"git shortlog decode-fcp.c list.h nosy-dump.[ch]" from nosy's git
repository:
Jonathan Woithe (1):
Save logs on Ctrl-C
Kristian Høgsberg (11):
Pull over nosy from mercurial repo.
Remove some fields from default view, add logging feature.
Use infinite time out for poll(), mark more detail fields.
Fix byte ordering macro.
Add decoding of iso data and lock packets.
Add flag to indicate data length field.
Add cycle start packet decoding, add --iso and --cycle-start flags.
Distinguish between phy-packets and 0-length iso data.
Fix transaction and stats view.
Add simple AV/C decoder.
Don't break down on big payloads.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Kristian Høgsberg <krh@bitplanet.net>
These are the ioctls for the special-purpose misc device /dev/nosy, the
interface to the IEEE 1394 packet sniffer/ protocol analyzer driver.
Currently only the numbers 00...02 are in use; let's block a few more
for unforeseen use cases.
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Replace home-grown printk wrapper macros by ones from kernel.h and
device.h.
Also raise the log level in set_phy_reg() from debug to error because
these are really error conditions. Could even be WARN_ON. Lower the
log level in the device probe and driver shutdown from notice to info.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
1.) The DMA programs (struct pcl) are PCI-endian = little endian data
(except for the 3rd quadlet in a PCL which the controller does not
touch). Annotate them as such.
Fix all accesses of the PCL to work with big endian CPUs also. Not
actually tested, I only have a little endian PC to test with. This
includes replacement of a bitfield struct pcl_status by open-coded
shift and mask operations.
2.) The two __attribute__ ((packed)) at struct pcl are not really
required since it consists of u32/__le32 only, i.e. there will be no
padding with or without the attribute.
3.) The received IEEE 1394 data are byteswapped by the controller from
IEEE 1394 endian = big endian to PCI endian = little endian because the
PCL_BIGENDIAN control bit is set. Therefore annotate the DMA buffer as
a __le32 array.
Fix the one access of the DMA buffer (the check of the transaction code
of link packets) to work with big endian CPUs. Also fix the two
accesses of the client bounce buffer (the reading of packet length).
4.) Add a comment to the userspace ABI header that all of the data gets
out as little endian data, except for the timestamp which is CPU endian.
(We could make it little endian too, but why? Vice versa, an ioctl
could be added to dump packet data in big endian byte order...)
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Fix race between nosy_open() and remove_card() by replacing the
unprotected array of card pointers by a mutex-protected list of cards.
Make card instances reference-counted and let each client hold a
reference.
Notify clients about card removal via POLLHUP in poll()'s events
bitmap; also let read() fail with errno=ENODEV if the card was removed
and everything in the buffer was read.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
nosy_start/stop_snoop() and nosy_add/remove_client() are simple enough
to be inlined into their callers.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
nosy_start/stop_snoop() are always only called by the ioctl method, i.e.
with IRQs enabled. packet_handler() and bus_reset_handler() are always
only called by the IRQ handler. Hence neither one needs to track IRQ
flags.
To underline the call context of packet_handler() and
bus_reset_handler(), rename these functions to *_irq_handler().
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
nosy_stop_snoop() would blow up the second time it was called without
nosy_start_snoop() in between.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
The required serialization of NOSY_IOC_START and NOSY_IOC_STOP is
already provided by the client_list_lock.
NOSY_IOC_FILTER does not really require serialization since accesses
to tcode_mask are atomic on any sane CPU architecture. Nevertheless,
make it explicit that we want this to be atomic by means of
client_list_lock (which also surrounds the other tcode_mask access in
the IRQ handler). While we are at it, change the type of tcode_mask to
u32 for consistency with the user API.
NOSY_IOC_GET_STATS does not require serialization against itself. But
there is a bug here regarding concurrent updates of the two counters
by the IRQ handler. Fix it by taking the client_list_lock in this ioctl
too.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Extend copyright note to 2007, c.f. Kristian's git log.
Includes:
- replace some <asm/*.h> by <linux/*.h>
- add required indirectly included <linux/spinlock.h>
- order alphabetically
Coding style related changes:
- change to utf8
- normalize whitespace
- normalize comment style
- remove usages of __FUNCTION__
- remove an unnecessary cast from void *
Const and static declarations:
- driver_name is not const in pci_driver.name, drop const qualifier
- driver_name can be taken from KBUILD_MODNAME
- the global variable minors[] can and should be static
- constify struct file_operations instance
Data types:
- Remove unused struct member struct packet.code. struct packet is
only used for driver-internal bookkeeping; it does not appear on the
wire or in DMA programs or the userspace ABI. Hence the unused
member .code can be removed without worries.
Preprocessor macros:
- unroll a preprocessor macro that containd a return
- use list_for_each_entry
Printk:
- add missing terminating \n in some format strings
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This adds the traffic sniffer driver for Texas Instruments PCILynx/
PCILynx2 based cards. The use cases for nosy are analysis of
nonstandard protocols and as an aid in development of drivers,
applications, or firmwares.
Author of the driver is Kristian Høgsberg. Known contributers are
Jody McIntyre and Jonathan Woithe.
Nosy programs PCILynx chips to operate in promiscuous mode, which is a
feature that is not found in OHCI-1394 controllers. Hence, only special
hardware as mentioned in the Kconfig help text is suitable for nosy.
This is only the kernelspace part of nosy. There is a userspace
interface to it, called nosy-dump, proposed to be added into the tools/
subdirectory of the kernel sources in a subsequent change. Kernelspace
and userspave component of nosy communicate via a 'misc' character
device file called /dev/nosy with a simple ioctl() and read() based
protocol, as described by nosy-user.h.
The files added here are taken from
git://anongit.freedesktop.org/~krh/nosy commit ee29be97 (2009-11-10)
with the following changes by Stefan Richter:
- Kconfig and Makefile hunks are written from scratch.
- Commented out version printk in nosy.c.
- Included missing <linux/sched.h>, reported by Stephen Rothwell.
"git shortlog nosy{-user.h,.c,.h}" from nosy's git repository:
Jonathan Woithe (2):
Nosy updates for recent kernels
Fix uninitialised memory (needed for 2.6.31 kernel)
Kristian Høgsberg (5):
Pull over nosy from mercurial repo.
Use a misc device instead.
Add simple AV/C decoder.
Don't break down on big payloads.
Set parent device for misc device.
As a low-level IEEE 1394 driver, its files are placed into
drivers/firewire/ although nosy is not part of the firewire driver
stack.
I am aware of the following literature from Texas Instruments about
PCILynx programming:
SCPA020A - PCILynx 1394 to PCI Bus Interface TSB12LV21BPGF
Functional Specification
SLLA023 - Initialization and Asynchronous Programming of the
TSB12LV21A 1394 Device
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Kristian Høgsberg <krh@bitplanet.net>
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Do not try to disable hpet if it hasn't been initialized before
x86, i8259: Only register sysdev if we have a real 8259 PIC
Patch 9e39f7c5b3 changed the
DBG_PRINT() macro and the if clause was wrongly changed. It means
that currently all the DBG_PRINT are being printed, flooding the
kernel log buffer with things like:
s2io: eth6: Next block at: c0000000b9c90000
s2io: eth6: In Neterion Tx routine
Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Acked-by: Sreenivasa Honnur <Sreenivasa.Honnur@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus:
MIPS: Set io_map_base for several PCI bridges lacking it
MIPS: Alchemy: Define eth platform devices in the correct order
MIPS: BCM63xx: Prevent second enet registration on BCM6338
MIPS: Quit using undefined behavior of ADDU in 64-bit atomic operations.
MIPS: N32: Define getdents64.
MIPS: MTX-1: Fix PCI on the MeshCube and related boards
MIPS: Make init_vdso a subsys_initcall.
MIPS: "Fix" useless 'init_vdso successfully' message.
MIPS: PowerTV: Move register setup to before reading registers.
SOUND: Au1000: Fix section mismatch
VIDEO: Au1100fb: Fix section mismatch
VIDEO: PMAGB-B: Fix section mismatch
VIDEO: PMAG-BA: Fix section mismatch
NET: declance: Fix section mismatches
VIDEO. gbefb: Fix section mismatches.
Fix error from the last pull request. Making sure we shut the panel off
is more correct and saves power.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds
Steven Whitehouse
Takashi Iwai
Sekhar Nori
Anuj Aggarwal
Jon Povey
Anton Vorontsov
Rudolf Marek
Jason Baron
Yehuda Sadeh
Latchesar Ionkov
Martin Schwidefsky
Heiko Carstens
Anton Blanchard
Peter Zijlstra
Axel Lin
Stefan Richter
Breno Leitao
Jesse Barnes