Commit graph

376,031 commits

Author SHA1 Message Date
Willy Tarreau
ee40a116eb net: mvneta: fix improper tx queue usage in mvneta_tx()
mvneta_tx() was using a static tx queue number causing crashes as
soon as a little bit of traffic was sent via the interface, because
it is normally expected that the same queue should be used as in
dev_queue_xmit().

As suggested by Ben Hutchings, let's use skb_get_queue_mapping() to
get the proper Tx queue number, and use alloc_etherdev_mqs() instead
of alloc_etherdev_mq() to create the queues.

Both my Mirabox and my OpenBlocks AX3 used to crash without this patch
and don't anymore with it. The issue appeared in 3.8 but became more
visible after the fix allowing GSO to be enabled.

Original work was done by Dmitri Epshtein and Thomas Petazzoni. I
just adapted it to take care of Ben's comments.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Cc: Dmitri Epshtein <dima@marvell.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-15 14:08:13 -04:00
Federico Vaga
5a65dcc04c serial_core.c: add put_device() after device_find_child()
The serial core uses device_find_child() but does not drop the reference to
the retrieved child after using it. This patch add the missing put_device().

What I have done to test this issue.

I used a machine with an AMBA PL011 serial driver. I tested the patch on
next-20120408 because the last branch [next-20120415] does not boot on this
board.

For test purpose, I added some pr_info() messages to print the refcount
after device_find_child() (lines: 1937,2009), and after put_device()
(lines: 1947, 2021).

Boot the machine *without* put_device(). Then:

echo reboot > /sys/power/disk
echo disk > /sys/power/state
[   87.058575] uart_suspend_port:1937 refcount 4
[   87.058582] uart_suspend_port:1947 refcount 4
[   87.098083] uart_resume_port:2009refcount 5
[   87.098088] uart_resume_port:2021 refcount 5

echo disk > /sys/power/state
[  103.055574] uart_suspend_port:1937 refcount 6
[  103.055580] uart_suspend_port:1947 refcount 6
[  103.095322] uart_resume_port:2009 refcount 7
[  103.095327] uart_resume_port:2021 refcount 7

echo disk > /sys/power/state
[  252.459580] uart_suspend_port:1937 refcount 8
[  252.459586] uart_suspend_port:1947 refcount 8
[  252.499611] uart_resume_port:2009 refcount 9
[  252.499616] uart_resume_port:2021 refcount 9

The refcount continuously increased.

Boot the machine *with* this patch. Then:

echo reboot > /sys/power/disk
echo disk > /sys/power/state
[  159.333559] uart_suspend_port:1937 refcount 4
[  159.333566] uart_suspend_port:1947 refcount 3
[  159.372751] uart_resume_port:2009 refcount 4
[  159.372755] uart_resume_port:2021 refcount 3

echo disk > /sys/power/state
[  185.713614] uart_suspend_port:1937 refcount 4
[  185.713621] uart_suspend_port:1947 refcount 3
[  185.752935] uart_resume_port:2009 refcount 4
[  185.752940] uart_resume_port:2021 refcount 3

echo disk > /sys/power/state
[  207.458584] uart_suspend_port:1937 refcount 4
[  207.458591] uart_suspend_port:1947 refcount 3
[  207.498598] uart_resume_port:2009 refcount 4
[  207.498605] uart_resume_port:2021 refcount 3

The refcount correctly handled.

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 11:08:12 -07:00
Peter Hurley
579a00a5c2 tty: Fix unsafe bit ops in tty_throttle_safe/unthrottle_safe
tty->flags needs to be atomically modified.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 11:08:12 -07:00
Mike Rapoport
ab09a6d0d3 vxlan: don't bypass encapsulation for multi- and broadcasts
The multicast and broadcast packets may have RTCF_LOCAL set in rt_flags
and therefore will be sent out bypassing encapsulation. This breaks
delivery of packets sent to the vxlan multicast group.
Disabling encapsulation bypass for multicasts and broadcasts fixes the
issue.

Signed-off-by: Mike Rapoport <mike.rapoport@ravellosystems.com>
Tested-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Sridhar Samudrala <sri@us.ibm.com>
Tested-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-15 14:06:39 -04:00
Wei Yongjun
06848c10f7 esp4: fix error return code in esp_output()
Fix to return a negative error code from the error handling
case instead of 0, as returned elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-15 14:05:34 -04:00
Alexander Shiyan
31815c08fc serial: sccnxp: Replace pdata.init/exit with regulator API
Typical usage of pdata.init/exit is enable/disable power and/or toggle
reset for the target chip.
This patch replaces these callbacks with regulator API.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 11:04:07 -07:00
Alexander Shiyan
289b8dd695 serial: sccnxp: Do not override device name
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 11:04:07 -07:00
stephen hemminger
8f3359bdc8 bridge: make user modified path cost sticky
Keep a STP port path cost value if it was set by a user.
Don't replace it with the link-speed based path cost
whenever the link goes down and comes back up.

Reported-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-04-15 14:03:44 -04:00
Jiri Slaby
f4b208eb91 TTY: pty, fix compilation warning
When CONFIG_UNIX98_PTYS is unset, we see this warning in pty:
  drivers/tty/pty.c:409:13: warning: ‘pty_unix98_shutdown’ defined but not used

Fix that by moving the function to a section which depends on that
config.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Toralf Foerster <toralf.foerster@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 11:02:54 -07:00
Jiri Slaby
f678c44002 TTY: rocket, fix compilation warning
When CONFIG_PCI is unset, we see these warnings in rocket:
  drivers/tty/rocket.c:3140:13: warning: 'rmSpeakerReset' defined but not used
  drivers/tty/rocket.c:2599:12: warning: 'sPCIInitController' defined but not used

Fix those by moving the functions to one place and make them depend on
CONFIG_PCI.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: Toralf Foerster <toralf.foerster@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 11:00:59 -07:00
Frederic Weisbecker
c5bfece2d6 nohz: Switch from "extended nohz" to "full nohz" based naming
"Extended nohz" was used as a naming base for the full dynticks
API and Kconfig symbols. It reflects the fact the system tries
to stop the tick in more places than just idle.

But that "extended" name is a bit opaque and vague. Rename it to
"full" makes it clearer what the system tries to do under this
config: try to shutdown the tick anytime it can. The various
constraints that prevent that to happen shouldn't be considered
as fundamental properties of this feature but rather technical
issues that may be solved in the future.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
2013-04-15 19:58:17 +02:00
H Hartley Sweeten
fb86854109 staging: comedi: me_daq: use plx9052.h defines
Use the PLX 9052 register defines in plx9052.h instead of using
magic numbers for the register bits.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:55:58 -07:00
H Hartley Sweeten
4564cfd052 staging: comedi: plx9052.h: document the CNTRL register
Add defines for the PLX 9052 CNTRL register defines and use them
instead of the magic numbers in the me4000 driver

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:55:58 -07:00
H Hartley Sweeten
58af6b926e staging: comedi: me4000: use plx9052.h defines
Use the PLX 9052 register defines in plx9052.h instead of duplicating
the defines locally in this driver.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:55:58 -07:00
H Hartley Sweeten
fc09ec34f6 staging: comedi: adl_pci9111: use plx9052.h defines
Use the PLX 9052 register defines in plx9052.h instead of duplicating
the defines locally in this driver.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:55:58 -07:00
H Hartley Sweeten
926848220e staging: comedi: plx9052: tidy up the register defines
The PLX INTCSR register defines are a bit wordy and many of them
are not used anywhere.

For aesthetic reasons, remove all the *_MASK and *_DISABLED defines
and rename the remaining bit defines so they are not as wordy.

Convert all the bit defines to bit shifts.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:55:58 -07:00
H Hartley Sweeten
3646af9fda staging: comedi: cb_pcimdas: remove unused include
This driver does not use anything in the plx9052.h header. Remove
the unnecessary include.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:55:58 -07:00
Takashi Iwai
ad2109d7d2 ASoC: Updates for v3.10
A bunch of changes here, the most interesting one subsystem wise being
 Morimoto-san's work to create snd_soc_component which doesn't do much
 for now but will be pretty important going forwards:
 
  - Add a new component object type which will form the basis of moving
    to a more generic handling of SoC and off-SoC components, contributed
    by Kuninori Morimoto.
  - A fairly large set of cleanups for the dmaengine integration from
    Lars-Peter Clausen, starting to move towards being able to have a
    generic driver based on the library.
  - Performance optimisations to DAPM from Ryo Tsutsui.
  - Support for mixer control sharing in DAPM from Stephen Warren.
  - Multiplatform ARM cleanups from Arnd Bergmann.
  - New CODEC drivers for AK5385 and TAS5086 from Daniel Mack.
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Merge tag 'asoc-v3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next

ASoC: Updates for v3.10

A bunch of changes here, the most interesting one subsystem wise being
Morimoto-san's work to create snd_soc_component which doesn't do much
for now but will be pretty important going forwards:

 - Add a new component object type which will form the basis of moving
   to a more generic handling of SoC and off-SoC components, contributed
   by Kuninori Morimoto.
 - A fairly large set of cleanups for the dmaengine integration from
   Lars-Peter Clausen, starting to move towards being able to have a
   generic driver based on the library.
 - Performance optimisations to DAPM from Ryo Tsutsui.
 - Support for mixer control sharing in DAPM from Stephen Warren.
 - Multiplatform ARM cleanups from Arnd Bergmann.
 - New CODEC drivers for AK5385 and TAS5086 from Daniel Mack.
2013-04-15 19:45:16 +02:00
Frederic Weisbecker
0644ca5c77 nohz: Fix old dynticks idle Kconfig backward compatibility
In order to enforce backward compatibility with older
config files, we want the new dynticks-idle Kconfig entry
to default its value to the one of the old CONFIG_NO_HZ symbol
if present.

Namely we want:

	config NO_HZ # old obsolete dynticks idle symbol
		bool

	config NO_HZ_IDLE # new dynticks idle symbol
		default NO_HZ

However Kconfig prevents this to work if the old symbol
is not visible. And this is currently the case because
NO_HZ lacks a title in order to show it in make oldconfig
and alike.

To fix this, bring a minimal title and help text to the
obsolete Kconfig entry that explains its purpose. This
makes the "defaulting" to work.

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
2013-04-15 19:39:40 +02:00
Dave Jiang
75c6f0ab48 ioatdma: Adding write back descriptor error status support for ioatdma 3.3
v3.3 provides support for write back descriptor error status. This allows
reporting of errors in a descriptor field. In supporting this, certain
errors such as P/Q validation errors no longer halts the channel. The DMA
engine can continue to execute until the end of the chain and allow software
to report the "errors" up the stack. We are also going to mask those error
interrupts and handle them when the "chain" has completed at the end.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:46:15 +05:30
Dave Jiang
d302398da9 ioatdma: S1200 platforms ioatdma channel 2 and 3 falsely advertise RAID cap
This workaround checks for channel 2&3 and remove RAID cap.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:46:15 +05:30
Dave Jiang
7727eaa449 ioatdma: Adding support for 16 src PQ ops and super extended descriptors
v3.3 introduced 16 sources PQ operations. This also introduced super extended
descriptors to support the 16 srcs operations. This patch adds support for
the 16 sources ops and in turn adds the super extended descriptors for those
ops.

5 SED pools are created depending on the descriptor sizes. An SED can be a 64
bytes sized descriptor or larger and must be physically contiguous. A kmem
cache pool is created for allocating the software descriptor that manages the
hardware descriptor. The super extended descriptor will take place of extended
descriptor under certain operations and be "attached" to the op descriptor
during operation. This is a new feature for ioatdma v3.3.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:46:15 +05:30
Dave Jiang
e0884772d3 ioatdma: Removing hw bug workaround for CB3.x .2 and earlier
CB3.2 and earlier hardware has silicon bugs that are no longer needed with
the new hardware. We don't have to use a NULL op to signal interrupt for
RAID ops any longer. This code make sure the legacy workarounds only happen on
legacy hardware.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:46:14 +05:30
Sarah Sharp
2c97a63f6f Docs: Add info on supported kernels to REPORTING-BUGS.
One of the most common frustrations maintainers have with bug reporters
is the email that starts with "I have a two year old kernel from an
embedded vendor with some random drivers and fixes thrown in, and it's
crashing".

Be specific about what kernel versions the upstream maintainers will fix
bugs in, and direct bug reporters to their Linux distribution or
embedded vendor if the bug is in an unsupported kernel.

Suggest that bug reporters should reproduce their bugs on the latest -rc
kernel.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2013-04-15 10:10:21 -07:00
Sarah Sharp
7883a250fe Docs: Add "Gather info" section to REPORTING-BUGS.
Add a sub-heading, and emphasize reproducibility.

Suggest taking a picture of the oops message.  (Did no one have cameras
in 2006?)

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2013-04-15 10:10:21 -07:00
Sarah Sharp
d60418bce5 Docs: Step-by-step directions for reporting bugs.
REPORTING-BUGS is pretty disorganized.  Bug reporters are likely to be
in a frustrated, stressed frame of mind, so introduce methodical
step-by-step directions for how to report bugs.  Use titles so people
can skim it if necessary.

Slight changes in procedures:

1. Encourage people to report bugs to maintainers and sub-system mailing
lists, not LKML at first.  I've seen way too many people get lost in the
noise because they didn't Cc the maintainer or proper mailing list.

2. Link to bugzilla.kernel.org, and let people know that some
maintainers prefer bugs filed there vs. the mailing lists.  (Perhaps we
need an entry in MAINTAINERS for which is preferred?)

3. If someone doesn't know where to report a bug, encourage them to both
file a bugzilla entry and email LKML.  Their report is less likely to
get lost if there's a bugzilla entry.

Preserve text about reporting security bugs, and get_maintainer.pl.

More will be added/modified in upcoming patches.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2013-04-15 10:10:20 -07:00
Sarah Sharp
3b12c21ab3 Trivial: docs: Remove six-space indentation in REPORTING-BUGS.
Other paragraph format docs in Documentation don't use paragraph
indentations, so conform REPORTING-BUGS to that.

Re-wrap the paragraphs, keeping the doc to a 74-character line length,
since that's what the original seemed to use.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2013-04-15 10:10:19 -07:00
Devendra Naga
c0352cb71d staging: gdm72xx: cancel work when driver unloads
cancel the work function at driver unload stage and remove
the function from the queue

Cc: Ben Chan <benchan@chromium.org>
Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:06:33 -07:00
Bastian Hecht
cbaf7f8080 ARM - shmobile: Armadillo800EVA: Move st1232 reset pin handling
We no longer need to set up the reset pin for the st1232 in the board
code, but can pass the GPIO number via the platform data to the driver.
This results in a cleaner grouping of the device setup.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-04-15 10:05:27 -07:00
H Hartley Sweeten
af0f3a56fa scsi: pcmcia: nsp_cs: remove module init/exit function prototypes
This driver now uses the module_pcmcia_driver() macro to supply the
init/exit code. The nsp_cs_{init,exit} prototypes should be removed.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:03:21 -07:00
Tomas Winkler
5f1e54e8c1 mei: wd: fix line over 80 characters
Fix checkpatch warning:
WARNING: line over 80 characters

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-04-15 10:03:21 -07:00
Bastian Hecht
e6a9081055 Input: st1232 - add reset pin handling
We add the possibility to hand over a GPIO number for the reset pin.
This way we can remove existing board code that takes care of it and
group this information properly in the platform data or in the device
tree configuration.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-04-15 10:00:44 -07:00
Laurent Pinchart
95b24d2213 Input: st1232 - convert to devm_* infrastructure
Use the devm_* managed functions to allocate resources.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-04-15 10:00:30 -07:00
Bjorn Helgaas
b638d7e7b8 PCI: Remove unused variables
This fixes "set but not used" warnings found via "make W=1".

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-04-15 10:56:27 -06:00
Bjorn Helgaas
c3139ba212 PCI: Move cpci_hotplug_init() proto to header file
cpci_hotplug_init() and cpci_hotplug_exit() are defined in
cpci_hotplug_core.c but had extern declarations in pci_hotplug_core.c.
This puts the declarations in a header file included both places so
the compiler can help keep everything consistent.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2013-04-15 10:44:18 -06:00
Andy Shevchenko
42c91ee71d dw_dmac: add ACPI support
Since we have proper ACPI DMA helpers implemented, the driver may use it. This
patch introduces custom filter function together with acpi_device_id table.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:04:19 +05:30
Andy Shevchenko
4e82f5ddd1 dmaengine: call acpi_dma_request_slave_channel as well
The slave device could be enumerated by ACPI. In that case the
dma_request_slave_channel should use the acpi_dma_request_slave_channel()
helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:04:10 +05:30
Andy Shevchenko
1b2e98bc1e dma: acpi-dma: introduce ACPI DMA helpers
There is a new generic API to get a DMA channel for a slave device (commit
9a6cecc8 "dmaengine: add helper function to request a slave DMA channel"). In
similar fashion to the DT case (commit aa3da644 "of: Add generic device tree
DMA helpers") we introduce helpers to the DMAC drivers which are enumerated by
ACPI.

The proposed extension provides the following API calls:
	acpi_dma_controller_register(), devm_acpi_dma_controller_register()
	acpi_dma_controller_free(), devm_acpi_dma_controller_free()
	acpi_dma_simple_xlate()
	acpi_dma_request_slave_chan_by_index()
	acpi_dma_request_slave_chan_by_name()

The first two should be used, for example, at probe() and remove() of the
corresponding DMAC driver. At the register stage the DMAC driver supplies a
custom xlate() function to translate a struct dma_spec into struct dma_chan.

Accordingly to the ACPI Fixed DMA resource specification the only two pieces of
information the slave device has are the channel id and the request line (slave
id). Those two are represented by struct dma_spec. The
acpi_dma_request_slave_chan_by_index() provides access to the specifix FixedDMA
resource by its index. Whereas dma_request_slave_channel() takes a string
parameter to identify the DMA resources required by the slave device. To make a
slave device driver work with both DeviceTree and ACPI enumeration a simple
convention is established: "tx" corresponds to the index 0 and "rx" to the
index 1. In case of robust configuration the slave device driver unfortunately
needs to call acpi_dma_request_slave_chan_by_index() directly.

Additionally the patch provides "managed" version of the register/free pair
i.e. devm_acpi_dma_controller_register() and devm_acpi_dma_controller_free().
Usually, the driver uses only devm_acpi_dma_controller_register().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-04-15 22:04:10 +05:30
Lucas Stach
92b775c294 i2c: mxs: do error checking and handling in PIO mode
In PIO mode we can end up with the same errors as in DMA mode, but as IRQs
are disabled there we have to check for them manually after each command.

Also don't use the big controller reset hammer when receiving a NAK from a
slave. It's sufficient to tell the controller to continue at a clean state.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:29:58 +02:00
Mark Brown
cd2d95d97c Linux 3.9-rc7
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Merge tag 'v3.9-rc7' into regulator-fix-core

Linux 3.9-rc7

Trivial context overlap conflicts:
	MAINTAINERS
2013-04-15 17:27:12 +01:00
Lucas Stach
535ebd217d i2c: mxs: remove races in PIO code
This commit fixes the three following races in PIO code:

- The CTRL0 register is racy in itself, when programming transfer state and
  run bit in the same cycle the hardware sometimes ends up using the state
  from the last transfer. Fix this by programming state in one cycle, make
  sure the write is flushed down APBX bus by reading back the reg and only
  then trigger the run bit.

- Only clear the DMAREQ bit in DEBUG0 after the read/write to the data reg
  happened. Otherwise we are racing with the hardware about who touches
  the data reg first.

- When checking for completion of a transfer it's not sufficient to check
  if the data engine finished, but also a check for i2c bus idle is needed.
  In PIO mode we are really fast to program the next transfer after a finished
  one, so the controller possibly tries to start a new transfer while the
  clkgen engine is still busy writing the NAK/STOP from the last transfer to
  the bus.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:26:46 +02:00
Axel Lin
a2f07305e5 regulator: max8997: Test pdata by NULL checking instead of IS_ERR_OR_NULL
pdata is either a valid pointer or NULL, use NULL checking rather than
IS_ERR_OR_NULL macro.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-04-15 17:21:18 +01:00
Mika Westerberg
4345233522 i2c-designware: switch to use runtime PM autosuspend
Using autosuspend helps to reduce the resume latency in situations where
another I2C message is going to be started soon. For example with HID over
I2C touch panels we get several messages in a short period of time while
the touch panel is in use.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:18:45 +02:00
Mika Westerberg
1451b91ffe i2c-designware: use usleep_range() in the busy-loop
This is not an atomic context so there is no need to use mdelay() but
instead use usleep_range().

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:18:14 +02:00
Mika Westerberg
3ca4ed8715 i2c-designware: enable/disable the controller properly
The correct way to disable or enable the controller is to wait until the
DW_IC_ENABLE_STATUS register bit matches the bit we program into DW_IC_ENABLE
register. This procedure is described in the DesignWare I2C databook.

By doing this we can be sure that the controller is in correct state once
the function returns.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:17:51 +02:00
Mika Westerberg
efe7d640ef i2c-designware: use dynamic adapter numbering on Lynxpoint
It is not good idea to mix static and dynamic I2C adapter numbering. In
this particular case on Lynxpoint we had graphics I2C adapter which took
the first numbers preventing the designware I2C driver from using the
adapter numbers it preferred.

Since Lynxpoint support was just introduced and there is no hardware available
outside Intel we can fix this by switching to use dynamic adapter numbering
instead of static.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:17:28 +02:00
Andy Shevchenko
76cf3fc844 i2c-designware-pci: use managed functions pcim_* and devm_*
This makes the error handling much more simpler than open-coding everything
and in addition makes the probe function smaller an tidier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:17:06 +02:00
Andy Shevchenko
ca0c1ff528 i2c-designware-pci: use dev_err() instead of printk()
With dev_err() we can get the device instance printed as well and is pretty
much standard to use dev_* macros in the drivers anyway. In addition
correct the indentation of probe() arguments.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:16:59 +02:00
Andy Shevchenko
1cb715ca46 i2c-designware: move to managed functions (devm_*)
This makes the error handling much more simpler than open-coding everything
and in addition makes the probe function smaller and tidier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-15 18:16:52 +02:00
Jason Gerecke
202dec868a Input: wacom - correct reported resolution for Intuos4 Wireless
Reported-by: Przemo Firszt <przemo@firszt.eu>
Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Tested-by: Przemo Firszt <przemo@firszt.eu>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-04-15 09:12:19 -07:00