Commit Graph

7766 Commits

Author SHA1 Message Date
Hans Verkuil 9c84d89bf1 [media] radio-mr800: fix locking order
Don't hold the lock before unregistering the device, since when the
device is unregistered the datastruct containing the lock may be freed
(if the refcount went to 0).

Also fixed the framework documentation that erroneously suggested the
wrong locking order as well.

Reported-by: David Ellingsworth <david@identd.dyndns.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: David Ellingsworth <david@identd.dyndns.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:18:15 -02:00
Hans Verkuil ee6869afc9 V4L/DVB: v4l2: add core serialization lock
Drivers can optionally set a pointer to a mutex in struct video_device.
The core will use that to lock before calling open, read, write, unlocked_ioctl,
poll, mmap or release.

Updated the documentation as well and ensure that v4l2-event knows about the
lock: it will unlock it before doing a blocking wait on an event and relock it
afterwards.

Ensure that the 'video_is_registered' check is done when the lock is held:
a typical disconnect will take the lock as well before unregistering the
device nodes, so to prevent race conditions the video_is_registered check
should also be done with the lock held.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:06:14 -02:00
Hans Verkuil d69f27186c V4L/DVB: v4l2-dev: after a disconnect any ioctl call will be blocked
Until now all fops except release and (unlocked_)ioctl returned an error
after the device node was unregistered. Extend this as well to the ioctl
fops. There is nothing useful that an application can do here and it
complicates the driver code unnecessarily.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:06:14 -02:00
Mauro Carvalho Chehab 96322b80e2 V4L/DVB: Deprecate stradis driver
The driver author seems to not worked on this driver since its conversion
from 2.2 to 2.4. Nobody is known to have a stradis hardware for testing. As
it still uses V4L1 API, BKL and probably some other old stuff, someone would
need to work on it to preserve the driver. Instead of investing time and
efforts to keep porting it to work with new API's, it seems better to just
drop the driver.

So, let's move it to drivers/staging and label it to die at 2.6.38, if nobody
cares enough to port parallel port support to gspca or to create a new driver
that uses the same gspca-cpia sub-driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:06:13 -02:00
Mauro Carvalho Chehab 7af97effb3 V4L/DVB: Deprecate cpia driver (used for parallel port webcams)
cpia driver were re-written inside gspca driver, for USB devices. The only
functionality that were not migrated is the support for parallel port,
as:
	1) the developer didn't find any hardware;
	2) it doesn't  seem important to keep support for a parallel port webcam,
	   as this is an obsolete technology;
	3) the changes at gspca for it to work with parallel port would be very large;
	4) this driver still uses BKL.

So, let's move it to drivers/staging and label it to die at 2.6.38, if nobody
cares enough to port parallel port support to gspca or to create a new driver
that uses the same gspca-cpia sub-driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:06:13 -02:00
Hans Verkuil a1de2e4b72 V4L/DVB: V4L Doc: removed duplicate link
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:57 -02:00
Hans Verkuil 6756207a71 V4L/DVB: V4L Doc: correct the documentation for VIDIOC_QUERYMENU
The VIDIOC_QUERYMENU documentation was not correct. EINVAL can be returned
if the driver does not support some of the menu items. I.e. in a list of
MPEG bitrates a driver generally supports only a subset of these.

This behavior has been in place for years, but was never properly documented.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:56 -02:00
Hans Verkuil 0827d0664d V4L/DVB: V4L Doc: document V4L2_CAP_RDS_OUTPUT capability
We forgot to add this capability to the QUERYCAP documentation.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:56 -02:00
Hans Verkuil 5e765c6e44 V4L/DVB: V4L Doc: fix DocBook syntax errors
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:56 -02:00
Jean-François Moine 008d35f2f5 V4L/DVB: v4l2: Add illuminator controls
Some media devices (microscopes) may have one or many illuminators.
This patch makes them controlable by the applications.

Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Acked-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:54 -02:00
Alexander Goncharov 2a3b501ffd V4L/DVB: gspca - sonixj: Add webcam 0c45:612b
Signed-off-by: Alexander Goncharov <alexzandersss@gmail.com>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:54 -02:00
Jean-François Moine 860e7f474c V4L/DVB: gspca - sonixj: Webcam 0c45:6102 added
Tested-by: Simon Danner <simon@danner-urloffen.de>
Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:54 -02:00
Mauro Carvalho Chehab 87660547de devices.txt: Remove the old obsolete vtx device nodes
Teletext interface is provided via VBI interface for a long time. There's no
need nor is there any known program using those old /dev/vtx nodes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:49 -02:00
Hans Verkuil f44026dbe4 V4L/DVB: Documentation: update now that the vtx/videotext API has been removed
Remove all references to /dev/vtx in the documentation, except for
some historical comments in dev-teletext.xml.

Documentation/devices.txt is not updated, this will go through Alan Cox
who maintains this file.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:05:48 -02:00
Malcolm Priestley d2f918bba7 V4L/DVB: Support or LME2510(C) DM04/QQBOX USB DVB-S BOXES
DM04/QQBOX DVB-S USB BOX with LME2510C+SHARP:BS2F7HZ7395 or LME2510+LGTDQT-P001F tuner.

[mchehab@redhat.com: Fix merge conflicts/compilation and CodingStyle issues]
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:04:54 -02:00
Laurent Pinchart 692d552264 V4L/DVB: v4l: Add a v4l2_subdev host private data field
The existing priv field stores subdev private data owned by the subdev
driver. Host (bridge) drivers might need to store per-subdev
host-specific data, such as a pointer to platform data.

Add a v4l2_subdev host_priv field to store host-specific data, and
rename the existing priv field to dev_priv.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:04:52 -02:00
Mauro Carvalho Chehab 516c714c6c V4L/DVB: Add documentation about the Ibmcam/Konica new gspca driver formats
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21 01:04:46 -02:00
Linus Torvalds 85a331881d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (27 commits)
  net: clear heap allocation for ETHTOOL_GRXCLSRLALL
  isdn: strcpy() => strlcpy()
  Revert "mac80211: use netif_receive_skb in ieee80211_tx_status callpath"
  mac80211: delete AddBA response timer
  ath9k_hw: fix regression in ANI listen time calculation
  caif: fix two caif_connect() bugs
  bonding: fix WARN_ON when writing to bond_master sysfs file
  skge: add quirk to limit DMA
  MAINTAINERS: update Intel LAN Ethernet info
  e1000e.txt: Add e1000e documentation
  e1000.txt: Update e1000 documentation
  ixgbevf.txt: Update ixgbevf documentation
  cls_u32: signedness bug
  Bluetooth: Disallow to change L2CAP_OPTIONS values when connected
  sctp: Fix out-of-bounds reading in sctp_asoc_get_hmac()
  sctp: prevent reading out-of-bounds memory
  ipv4: correct IGMP behavior on v3 query during v2-compatibility mode
  netdev: Depend on INET before selecting INET_LRO
  Revert "ipv4: Make INET_LRO a bool instead of tristate."
  net: Fix the condition passed to sk_wait_event()
  ...
2010-10-09 12:06:26 -07:00
Naoya Horiguchi 6715981312 page-types.c: fix name of unpoison interface
The page-types utility still uses an out of date name for the
unpoison interface: debugfs:hwpoison/renew-pfn
This patch renames and fixes it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
2010-10-07 09:41:24 +02:00
David S. Miller 12e94471b2 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2010-10-06 19:11:17 -07:00
Jeff Kirsher da8c01c450 e1000e.txt: Add e1000e documentation
Adds documentation for the e1000e networking driver.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-05 13:28:07 -07:00
Jeff Kirsher 2bff89c3f3 e1000.txt: Update e1000 documentation
Updated the e1000 networking driver documentation.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-05 13:27:31 -07:00
Jeff Kirsher c4b8c01112 ixgbevf.txt: Update ixgbevf documentation
Update the documentation for the ixgbevf (ixgbe virtual
function driver).

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-05 13:27:30 -07:00
Guenter Roeck a51b9944a1 hwmon: (adm1031) Replace update_rate sysfs attribute with update_interval
The attribute reflects an interval, not a rate.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-09-17 17:24:14 +02:00
Linus Torvalds 3a919cf0bf Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
  regulator: wm8350-regulator - fix the logic of checking REGULATOR_MODE_STANDBY mode
  regulator: wm831x-ldo - fix the logic to set REGULATOR_MODE_IDLE and REGULATOR_MODE_STANDBY modes
  regulator: ab8500 - fix off-by-one value range checking for selector
  regulator: 88pm8607 - fix value range checking for accessing info->vol_table
  regulator: isl6271a-regulator - fix regulator_desc parameter for regulator_register()
  regulator: ad5398 - fix a memory leak
  regulator: Update e-mail address for Liam Girdwood
  regulator: set max8998->dev to &pdev->dev.
  regulator: tps6586x-regulator - fix bit_mask parameter for tps6586x_set_bits()
  regulator: tps6586x-regulator - fix value range checking for val
  regulator: max8998 - set max8998->num_regulators
  regulator: max8998 - fix memory allocation size for max8998->rdev
  regulator: tps6507x - remove incorrect comments
  regulator: max1586 - improve the logic of choosing selector
  regulator: ab8500 - fix the logic to remove already registered regulators in error path
  regulator: ab3100 - fix the logic to remove already registered regulators in error path
  regulator/ab8500: move dereference below the check for NULL
2010-09-16 12:54:39 -07:00
Linus Torvalds 94ca9d669a Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: add documentation
2010-09-16 12:50:31 -07:00
Tejun Heo c54fce6eff workqueue: add documentation
Update copyright notice and add Documentation/workqueue.txt.

Randy Dunlap, Dave Chinner: misc fixes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-By: Florian Mickler <florian@mickler.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>
2010-09-13 10:26:52 +02:00
Randy Dunlap 39d709392f docbook: skip files with no docs since they generate scary warnings
Fix docbook templates that reference files that do not contain the
expected kernel-doc notation.

Fixes these warnings:

  Warning(arch/x86/include/asm/unaligned.h): no structured comments found
  Warning(lib/vsprintf.c): no structured comments found

These cause errors in the generated html output, like below, so drop
these lines.

  Name
  arch/x86/include/asm/unaligned.h - Document generation inconsistency
  Oops
  Warning
  The template for this document tried to insert the structured comment from the file arch/x86/include/asm/unaligned.h at this point, but none was found. This dummy section is inserted to allow generation to continue.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-11 16:49:21 -07:00
Johannes Berg eda603f6cd docbook: warn on unused doc entries
When you don't use !E or !I but only !F, then it's very easy to miss
including some functions, structs etc.  in documentation.  To help
finding which ones were missed, allow printing out the unused ones as
warnings.

For example, using this on mac80211 yields a lot of warnings like this:

  Warning: didn't use docs for DOC: mac80211 workqueue
  Warning: didn't use docs for ieee80211_max_queues
  Warning: didn't use docs for ieee80211_bss_change
  Warning: didn't use docs for ieee80211_bss_conf

when generating the documentation for it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-11 16:49:21 -07:00
Linus Torvalds ff3cb3fec3 Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  block: Range check cpu in blk_cpu_to_group
  scatterlist: prevent invalid free when alloc fails
  writeback: Fix lost wake-up shutting down writeback thread
  writeback: do not lose wakeup events when forking bdi threads
  cciss: fix reporting of max queue depth since init
  block: switch s390 tape_block and mg_disk to elevator_change()
  block: add function call to switch the IO scheduler from a driver
  fs/bio-integrity.c: return -ENOMEM on kmalloc failure
  bio-integrity.c: remove dependency on __GFP_NOFAIL
  BLOCK: fix bio.bi_rw handling
  block: put dev->kobj in blk_register_queue fail path
  cciss: handle allocation failure
  cfq-iosched: Documentation help for new tunables
  cfq-iosched: blktrace print per slice sector stats
  cfq-iosched: Implement tunable group_idle
  cfq-iosched: Do group share accounting in IOPS when slice_idle=0
  cfq-iosched: Do not idle if slice_idle=0
  cciss: disable doorbell reset on reset_devices
  blkio: Fix return code for mkdir calls
2010-09-10 07:26:27 -07:00
Linus Torvalds 3657423c02 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: rawmidi: fix the get next midi device ioctl
  ALSA: hda - Fix wrong HP pin detection in snd_hda_parse_pin_def_config()
  ALSA: seq/oss - Fix double-free at error path of snd_seq_oss_open()
  ALSA: msnd-classic: Fix invalid cfg parameter
  ALSA: hda - Enable PC-beep for EeePC with ALC269 codec
  ALSA: hda - Add errata initverb sequence for CS42xx codecs
  ALSA: usb - Release capture substream URBs properly
  ALSA: virtuoso: fix setting of Xonar DS line-in/mic-in controls
  ALSA: virtuoso: work around missing reset in the Xonar DS Windows driver
  ALSA: hda - Add quirk for Lenovo T400s
  ALSA: usb-audio: fix detection of vendor-specific device protocol settings
  ALSA: usb-audio: Assume first control interface is for audio
  ALSA: hda - Add a new hp-laptop model for Conexant 5066, tested on HP G60
2010-09-10 07:23:45 -07:00
David Brownell c956126c13 gpio: doc updates
There's been some recent confusion about error checking GPIO numbers.
briefly, it should be handled mostly during setup, when gpio_request() is
called, and NEVER by expectig gpio_is_valid to report more than
never-usable GPIO numbers.

[akpm@linux-foundation.org: terminate unterminated comment]
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Eric Miao" <eric.y.miao@gmail.com>
Cc: "Ryan Mallon" <ryan@bluewatersys.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09 18:57:24 -07:00
Linus Torvalds 79637a41e4 Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  gcc-4.6: kernel/*: Fix unused but set warnings
  mutex: Fix annotations to include it in kernel-locking docbook
  pid: make setpgid() system call use RCU read-side critical section
  MAINTAINERS: Add RCU's public git tree
2010-09-08 11:13:42 -07:00
Linus Torvalds d56557af19 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI: bus speed strings should be const
  PCI hotplug: Fix build with CONFIG_ACPI unset
  PCI: PCIe: Remove the port driver module exit routine
  PCI: PCIe: Move PCIe PME code to the pcie directory
  PCI: PCIe: Disable PCIe port services during port initialization
  PCI: PCIe: Ask BIOS for control of all native services at once
  ACPI/PCI: Negotiate _OSC control bits before requesting them
  ACPI/PCI: Do not preserve _OSC control bits returned by a query
  ACPI/PCI: Make acpi_pci_query_osc() return control bits
  ACPI/PCI: Reorder checks in acpi_pci_osc_control_set()
  PCI: PCIe: Introduce commad line switch for disabling port services
  PCI: PCIe AER: Introduce pci_aer_available()
  x86/PCI: only define pci_domain_nr if PCI and PCI_DOMAINS are set
  PCI: provide stub pci_domain_nr function for !CONFIG_PCI configs
2010-09-07 16:00:17 -07:00
Linus Torvalds cd4d4fc413 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: use zalloc_cpumask_var() for gcwq->mayday_mask
  workqueue: fix GCWQ_DISASSOCIATED initialization
  workqueue: Add a workqueue chapter to the tracepoint docbook
  workqueue: fix cwq->nr_active underflow
  workqueue: improve destroy_workqueue() debuggability
  workqueue: mark lock acquisition on worker_maybe_bind_and_lock()
  workqueue: annotate lock context change
  workqueue: free rescuer on destroy_workqueue
2010-09-07 14:08:17 -07:00
Randy Dunlap ef5dc121d5 mutex: Fix annotations to include it in kernel-locking docbook
Fix kernel-doc notation in linux/mutex.h and kernel/mutex.c,
then add these 2 files to the kernel-locking docbook as the
Mutex API reference chapter.

Add one API function to mutex-design.txt and correct a typo in
that file.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <20100902154816.6cc2f9ad.randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-03 08:19:51 +02:00
David Henningsson 048e78a5bc ALSA: hda - Add a new hp-laptop model for Conexant 5066, tested on HP G60
This new model adds the following functionality to HP G60:
- Automute of internal speakers
- Autoswitch of internal/external mics
- Remove SPDIF not physically present

BugLink: http://launchpad.net/bugs/587388
Cc: stable@kernel.org
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-09-02 11:49:17 +02:00
Mark Brown 606b2f490f regulator: Update e-mail address for Liam Girdwood
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-09-01 12:59:34 +01:00
Jason Baron 7c38875a0d workqueue: Add a workqueue chapter to the tracepoint docbook
Add a workqueue chapter to the traceopint docbook.

Current book is at: http://www.kernel.org/doc/htmldocs/tracepoint/

Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2010-08-27 12:27:36 +02:00
Rusty Russell f846619e7f lguest: clean up warnings in demonstration launcher.
These days the headers we use are in glibc.  If those are too old, you can
add the -I lines to get the kernel headers.

In file included from ../../include/linux/if_tun.h:19,
                 from lguest.c:33:
../../include/linux/types.h:13:2: warning: #warning "Attempt to use kernel headers from user space, see http://kernelnewbies.org/KernelHeaders"
lguest.c: In function ‘setup_tun_net’:
lguest.c:1456: warning: dereferencing pointer ‘sin’ does break strict-aliasing rules
lguest.c:1457: warning: dereferencing pointer ‘sin’ does break strict-aliasing rules
lguest.c:1450: note: initialized from here

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-08-27 08:39:51 +09:30
Rafael J. Wysocki 28eb5f274a PCI: PCIe: Ask BIOS for control of all native services at once
After commit 852972acff (ACPI: Disable
ASPM if the platform won't provide _OSC control for PCIe) control of
the PCIe Capability Structure is unconditionally requested by
acpi_pci_root_add(), which in principle may cause problems to
happen in two ways.  First, the BIOS may refuse to give control of
the PCIe Capability Structure if it is not asked for any of the
_OSC features depending on it at the same time.  Second, the BIOS may
assume that control of the _OSC features depending on the PCIe
Capability Structure will be requested in the future and may behave
incorrectly if that doesn't happen.  For this reason, control of
the PCIe Capability Structure should always be requested along with
control of any other _OSC features that may depend on it (ie. PCIe
native PME, PCIe native hot-plug, PCIe AER).

Rework the PCIe port driver so that (1) it checks which native PCIe
port services can be enabled, according to the BIOS, and (2) it
requests control of all these services simultaneously.  In
particular, this causes pcie_portdrv_probe() to fail if the BIOS
refuses to grant control of the PCIe Capability Structure, which
means that no native PCIe port services can be enabled for the PCIe
Root Complex the given port belongs to.  If that happens, ASPM is
disabled to avoid problems with mishandling it by the part of the
PCIe hierarchy for which control of the PCIe Capability Structure
has not been received.

Make it possible to override this behavior using 'pcie_ports=native'
(use the PCIe native services regardless of the BIOS response to the
control request), or 'pcie_ports=compat' (do not use the PCIe native
services at all).

Accordingly, rework the existing PCIe port service drivers so that
they don't request control of the services directly.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-24 13:47:33 -07:00
Rafael J. Wysocki 79dd9182db PCI: PCIe: Introduce commad line switch for disabling port services
Introduce kernel command line switch pcie_ports= allowing one to
disable all of the native PCIe port services, so that PCIe ports
are treated like PCI-to-PCI bridges.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-08-24 13:43:15 -07:00
Linus Torvalds c05e1e23b8 Merge branch 'for-upstream/pvhvm' of git://xenbits.xensource.com/people/ianc/linux-2.6
* 'for-upstream/pvhvm' of git://xenbits.xensource.com/people/ianc/linux-2.6:
  xen: pvhvm: make it clearer that XEN_UNPLUG_* define bits in a bitfield
  xen: pvhvm: rename xen_emul_unplug=ignore to =unnnecessary
  xen: pvhvm: allow user to request no emulated device unplug
2010-08-23 18:29:18 -07:00
Ian Campbell 1dc7ce99b0 xen: pvhvm: rename xen_emul_unplug=ignore to =unnnecessary
It is not immediately clear what this option causes to become
ignored. The actual meaning is that it is not necessary to unplug the
emulated devices to safely use the PV ones, even if the platform does
not support the unplug protocol. (pressumably the user will only add
this option if they have ensured that their domain configuration is
safe).

I think xen_emul_unplug=unnecessary better captures this.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
2010-08-23 11:59:29 +01:00
Ian Campbell c93a4dfb31 xen: pvhvm: allow user to request no emulated device unplug
this allows the user to disable pvhvm and revert to emulated devices
in case of a system misconfiguration (e.g. initramfs with only
emulated drivers in it).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
2010-08-23 11:59:28 +01:00
Vivek Goyal 6d6ac1c1a3 cfq-iosched: Documentation help for new tunables
Some documentation to provide help with tunables.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-08-23 12:25:29 +02:00
Stephen Rothwell f6143a9b73 Documentation: fix ozlabs.org mailing list address
This list moved to lists.ozlabs.org quite some time ago.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-20 09:55:41 -07:00
Stefan Richter 1ee4168057 Documentation: kernel-locking: mutex_trylock cannot be used in interrupt context
Chapter 6 is right about mutex_trylock, but chapter 10 wasn't.  This error
was introduced during semaphore-to-mutex conversion of the Unreliable
guide.  :-)

If user context which performs mutex_lock() or mutex_trylock() is
preempted by interrupt context which performs mutex_trylock() on the same
mutex instance, a deadlock occurs.  This is because these functions do not
disable local IRQs when they operate on mutex->wait_lock.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Matthew Wilcox <matthew@wil.cx>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-20 09:34:56 -07:00
Andrew Morton f2e41e9103 revert "hwmon: f71882fg: add support for the Fintek F71808E"
Revert commit 7721fea3d0 ("hwmon:
f71882fg: add support for the Fintek F71808E").

Hans said:

: A second review after I've received a data sheet for this device from
: Fintek has turned up a few bugs.
:
: Unfortunately Giel (nor I) have time to fix this in time for the 2.6.36
: cycle.  Therefor I would like to see this patch reverted as not having any
: support for the hwmon function of this superio chip is better then having
: unreliable support.

Cc: Giel van Schijndel <me@mortis.eu>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-20 09:34:55 -07:00
Linus Torvalds 86ea51d4a2 Merge branch 'merge-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'merge-devicetree' of git://git.secretlab.ca/git/linux-2.6:
  spi.h: missing kernel-doc notation, please fix
  of: fix missing headers for of_address_to_resource() in MTD and SysACE drivers
  of: Fix missing includes
  ata: update for of_device to platform_device replacement
  microblaze: Fix of: eliminate of_device->node and dev_archdata->{of,prom}_node
  microblaze: Fix of/address: Merge all of the bus translation code
  booting-without-of: Remove nonexistent chapters from TOC, fix numbering
2010-08-18 09:26:17 -07:00