Takashi Iwai [Wed, 26 Aug 2015 08:23:26 +0000 (10:23 +0200)]
ALSA: usb-audio: Handle normal and auto-suspend equally
In theory, the device may get suspended even at runtime PM suspend.
Currently we don't save the mixer state for autopm, and it may bring
inconsistency.
This patch removes the special handling for autosuspend.
Takashi Iwai [Tue, 25 Aug 2015 14:09:00 +0000 (16:09 +0200)]
ALSA: usb-audio: Avoid nested autoresume calls
After the recent fix of runtime PM for USB-audio driver, we got a
lockdep warning like:
=============================================
[ INFO: possible recursive locking detected ]
4.2.0-rc8+ #61 Not tainted
---------------------------------------------
pulseaudio/980 is trying to acquire lock:
(&chip->shutdown_rwsem){.+.+.+}, at: [<ffffffffa0355dac>] snd_usb_autoresume+0x1d/0x52 [snd_usb_audio]
but task is already holding lock:
(&chip->shutdown_rwsem){.+.+.+}, at: [<ffffffffa0355dac>] snd_usb_autoresume+0x1d/0x52 [snd_usb_audio]
This comes from snd_usb_autoresume() invoking down_read() and it's
used in a nested way. Although it's basically safe, per se (as these
are read locks), it's better to reduce such spurious warnings.
The read lock is needed to guarantee the execution of "shutdown"
(cleanup at disconnection) task after all concurrent tasks are
finished. This can be implemented in another better way.
Also, the current check of chip->in_pm isn't good enough for
protecting the racy execution of multiple auto-resumes.
This patch rewrites the logic of snd_usb_autoresume() & co; namely,
- The recursive call of autopm is avoided by the new refcount,
chip->active. The chip->in_pm flag is removed accordingly.
- Instead of rwsem, another refcount, chip->usage_count, is introduced
for tracking the period to delay the shutdown procedure. At
the last clear of this refcount, wake_up() to the shutdown waiter is
called.
- The shutdown flag is replaced with shutdown atomic count; this is
for reducing the lock.
- Two new helpers are introduced to simplify the management of these
refcounts; snd_usb_lock_shutdown() increases the usage_count, checks
the shutdown state, and does autoresume. snd_usb_unlock_shutdown()
does the opposite. Most of mixer and other codes just need this,
and simply returns an error if it receives an error from lock.
Takashi Iwai [Wed, 26 Aug 2015 05:22:49 +0000 (07:22 +0200)]
ALSA: hda - Fix widget sysfs tree corruption after refresh
When snd_hdac_refresh_widget_sysfs() is called before the first
hda_widget_sysfs_init(), the next call overrides and eventually
fails. This results in unexpected Oops, something like:
BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8
IP: [<ffffffff8180e2a3>] hdmi_chmap_ctl_info+0x23/0x40
The fix is to add a check of the existing sysfs tree. Also, for more
safety, this patch adds the checks of device_is_registered() in
snd-hdac_refresh_wdiget_sysfs(), too.
Fixes: fa4f18b4f402 ('ALSA: hda - Refresh widgets sysfs at probing Haswell+ HDMI codecs')
Bugizlla: https://bugzilla.kernel.org/show_bug.cgi?id=103431 Reported-by: Andreas Reis <andreas.reis@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Tue, 25 Aug 2015 12:04:44 +0000 (14:04 +0200)]
ALSA: ppc: Add missing inclusion of linux/module.h
Otherwise it triggers a compile warning like:
sound/ppc/keywest.c:104:1: warning: data definition has no type or storage class
sound/ppc/keywest.c:104:1: error: type defaults to 'int' in declaration of 'MODULE_DEVICE_TABLE' [-Werror=implicit-int]
Fixes: a2bc2af66a5b ('ALSA: ppc: keywest: Export I2C module alias information') Reported-by: kbuild test robot <fengguang.wu@intel.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
ALSA: ppc: keywest: Export I2C module alias information
The I2C core always reports the MODALIAS uevent as "i2c:<client name"
regardless if the driver was matched using the I2C id_table or the
of_match_table. So the driver needs to export the I2C table and this
be built into the module or udev won't have the necessary information
to auto load the correct module when the device is added.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Tue, 25 Aug 2015 06:52:55 +0000 (08:52 +0200)]
ALSA: hda - Refresh sysfs at snd_hda_codec_update_widgets()
In the commit [fa4f18b4f402: ALSA: hda - Refresh widgets sysfs at
probing Haswell+ HDMI codecs], snd_hdac_refresh_widget_sysfs() is
explicitly called in the codec driver. But this results in refreshing
twice, as snd_hdac_refresh_widget_sysfs() itself calls
snd_hdac_refresh_widgets() function.
Instead, we can replace the call in snd_hda_codec_update_widgets()
with snd_hdac_refresh_widget_sysfs(). This also fixes the missing
sysfs update for ca0132, too.
Takashi Iwai [Mon, 24 Aug 2015 08:52:06 +0000 (10:52 +0200)]
ALSA: hda - Fix path power activation
The widget power-saving code tries to turn up/down the power of each
widget in the I/O paths that are modified at each jack plug/unplug.
The recent report revealed that the power activation leaves some
widgets unpowered after plugging. This is because
snd_hda_activate_path() turns on path->active flag at the end of the
function while the path power management is done before that. Then
it's regarded as if nothing is active, and the driver turns off the
power.
The fix is simply to set the flag at the beginning of the function,
before trying to power up.
Takashi Iwai [Mon, 24 Aug 2015 08:45:27 +0000 (10:45 +0200)]
ALSA: hda - Check all inputs for is_active_nid_for_any()
The is_active_nid_for_any() function in the generic parser is supposed
to check all connections from/to the given widget, but the current
code checks only the first input connection (index = 0).
This patch corrects the code to check all inputs by passing -1 to
index argument.
Markus Osterhoff [Mon, 24 Aug 2015 12:11:39 +0000 (14:11 +0200)]
ALSA: hda: fix possible NULL dereference
After a for-loop was replaced by list_for_each_entry, see
Commit bbbc7e8502c9 ("ALSA: hda - Allocate hda_pcm objects dynamically"),
Commit 751e2216899c ("ALSA: hda: fix possible null dereference"),
a possible NULL pointer dereference has been introduced; this patch adds
the NULL check on pcm->pcm, while leaving a potentially superfluous
check on pcm itself untouched.
Jeeja KP [Sun, 23 Aug 2015 06:22:51 +0000 (11:52 +0530)]
ALSA: hdac: Add snd_hdac_get_hdac_stream()
Add a helper to find the stream using stream tag and direction.
This is useful for drivers to query stream based on stream tag
and direction, fox example while downloading FW thru DSP loader
code
Jeeja KP [Fri, 21 Aug 2015 16:06:20 +0000 (21:36 +0530)]
ALSA: hdac: Add support to enable SPIB for hdac ext stream
The drivers need to set the spib and maxfifios values, so add
these new APIs snd_hdac_ext_stream_set_spib() and
snd_hdac_ext_stream_set_spbmaxfifo() APIs
For these APIs we also need to have spib and fifos pointer, so
add these to hdac_ext_stream and initialize them at stream init
New HDA controllers like Skylake sport multiple HDA links, so we need a
helper to turn off all the links in one go while suspending the device so
add snd_hdac_ext_bus_link_power_down_all() API
Jeeja KP [Fri, 21 Aug 2015 16:06:17 +0000 (21:36 +0530)]
ALSA: hdac: Fix to read the correct offset of spcap/link register
SPCAP and Mutilink register offset were incorrect as offset needs
to be based on capability offset. So correct the offset for
read/write of spcap/link register.
Convert the ac97_bus from legacy suspend/resume callbacks to dev_pm_ops.
Since there isn't anything special to do at the bus level the bus driver
does not have to implement any callbacks. The device driver core will
automatically pick up and execute the device's PM ops.
As there is only a single AC'97 driver implementing suspend and resume,
update both the core and driver at the same time to avoid unnecessary code
churn.
While we are at it also drop the ifdefs around the suspend/resume functions
to increase compile test coverage.
Intel Haswell (and later) codec refreshes the widgets tree to expose
the whole widget nodes at probing. However, this refresh was missing
for sysfs tree.
This patch adds the missing piece, as we have now a proper API.
Dan Carpenter [Fri, 21 Aug 2015 11:25:34 +0000 (14:25 +0300)]
ALSA: hdsp: silence and underflow warning
I believe this probably cannot happen, as the code suggests. There
would have to be an kcontrol->index.id which was zero, otherwise this
would be prevented in snd_ctl_find_id(). But snd_BUG_ON() is just a
WARN() or a no-op so static checkers complain that we keep on going with
a negative offset. Let's just handle the error as well as printing
a warning.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Vinod Koul [Fri, 21 Aug 2015 10:17:43 +0000 (15:47 +0530)]
ALSA: hdac: add snd_hdac_refresh_widget_sysfs()
Some codecs like Intel HDMI by default do not show up all the pins, they
have to be manually enabled, so we need to refresh the codec widgets and
then recreate the sysfs tree. So add new API snd_hdac_refresh_widget_sysfs()
to do this. It should be be used by codec driver after sending magic verbs
to codec
Vinod Koul [Fri, 21 Aug 2015 10:17:40 +0000 (15:47 +0530)]
ALSA: hdac: Add API for removing hdac extended device
The HDAC extended device objects are created by HDAC extended bus on probe.
When controller is removed they should be removed as well, so add API
snd_hdac_ext_bus_device_remove for this
ALSA: hda - Shutdown CX20722 on reboot/free to avoid spurious noises
On shutdown/reboot of CX20722, first shut down all EAPDs, then
shut down the afg node to D3.
Failure to do so can lead to spurious noises from the internal speaker
directly after reboot (and before the codec is reinitialized again, i e
in BIOS setup or GRUB menus).
Takashi Iwai [Wed, 19 Aug 2015 16:31:54 +0000 (18:31 +0200)]
Merge tag 'asoc-v4.2-disable-topology' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Disable topology support for v4.2
The topology code merged in the v4.2 merge window introduced a new ABI
which was believed to be suitable for use but subsequently additional
work by the developers of this feature have revealed some problems that
need to be addressed. In order to allow this to be done without having
to support the initial ABI add Kconfig to disable the build and also add
some #error statements to the UAPI header so users can't use them.
Julian Scheel [Wed, 19 Aug 2015 07:28:09 +0000 (09:28 +0200)]
ALSA: usb-audio: Recurse before saving terminal properties
The input terminal parser recurses into the referenced clock entity to verify
it is existant and thus the terminal descriptor is valid. The actual property
values of the term instance which is initially parsed must not be overriden by
the recursion. For this to work the term properties have to be assigned after
recursing into the referenced clock entity descriptors.
Takashi Iwai [Wed, 19 Aug 2015 05:20:14 +0000 (07:20 +0200)]
ALSA: usb-audio: Fix runtime PM unbalance
The fix for deadlock in PM in commit [1ee23fe07ee8: ALSA: usb-audio:
Fix deadlocks at resuming] introduced a new check of in_pm flag.
However, the brainless patch author evaluated it in a wrong way
(logical AND instead of logical OR), thus usb_autopm_get_interface()
is wrongly called at probing, leading to unbalance of runtime PM
refcount.
This patch fixes it by correcting the logic.
Reported-by: Hans Yang <hansy@nvidia.com> Fixes: 1ee23fe07ee8 ('ALSA: usb-audio: Fix deadlocks at resuming') Cc: <stable@vger.kernel.org> [v3.15+] Signed-off-by: Takashi Iwai <tiwai@suse.de>
Mark Brown [Tue, 18 Aug 2015 05:59:25 +0000 (22:59 -0700)]
ASoC: topology: Disable use from userspace
Since the topology API is still in sufficient flux for changes to be
identified disable the use of the userspace ABI by adding #error
statements to the code, ensuring that nobody relies on the headers as
currently defined. It is expected that this change will be reverted for
v4.3.
Mark Brown [Sat, 15 Aug 2015 15:24:20 +0000 (08:24 -0700)]
ASoC: topology: Add Kconfig option for topology
Allow the topology code to be compiled out so that users who don't need
topology don't need to havve the code compiled in, saving them some
memory.
Some more configuration could be added to remove some of the hooks into
the core data structures but that is probably best done with some
refactoring to use functions to do the updates of the data structures
rather than ifdefing in the code as we'd need to do at the minute.
Suggested-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Mark Brown <broonie@kernel.org>
Takashi Iwai [Mon, 17 Aug 2015 12:57:32 +0000 (14:57 +0200)]
ALSA: hda/proc - Fix racy string access for power states
The power states in a proc file are printed in a racy manner on a
single static string buffer. Fix it by calling snd_iprintf() directly
for each state instead of processing on a temporary buffer.
Takashi Iwai [Mon, 17 Aug 2015 12:44:24 +0000 (14:44 +0200)]
ALSA: hda - Make some helper functions local
A few helper functions to convert the pin information to strings have
been exported with assumption that they were used by other drivers.
But they are referred only in the proc interface in the end.
Let's make them local so that we can get rid of a few exports.
ALSA: usb: handle descriptor with SYNC_NONE illegal value
The M-Audio Transit exposes an interface with a SYNC_NONE attribute.
This is not a valid value according to the USB audio classspec. However
there is a sync endpoint associated to this record. Changing the logic to
try to use this sync endpoint allows for seamless transitions between
altset 2 and altset 3. If any errors happen, the behavior remains the same.
$ more /proc/asound/card1/stream0
M-Audio Transit USB at usb-0000:00:14.0-2, full speed : USB Audio
ALSA: usb: fix corrupted pointers due to interface setting change
When a transition occurs between alternate settings that do not use the
same synchronization method, the substream pointers were not reset.
This prevents audio from being played during the second transition.
Identified and tested with M-Audio Transit device
(0763:2006 Midiman M-Audio Transit)
Details of the issue:
First playback to adaptive endpoint:
$ aplay -Dhw:1,0 ~/24_96.wav
Playing WAVE '/home/plb/24_96.wav' : Signed 24 bit Little Endian in 3bytes,
Rate 96000 Hz, Stereo
[ 3169.297556] usb 1-2: setting usb interface 1:1
[ 3169.297568] usb 1-2: Creating new playback data endpoint #3
[ 3169.298563] usb 1-2: Setting params for ep #3 (type 0, 3 urbs), ret=0
[ 3169.298574] usb 1-2: Starting data EP @ffff880035fc8000
first playback to asynchronous endpoint:
$ aplay -Dhw:1,0 ~/16_48.wav
Playing WAVE '/home/plb/16_48.wav' : Signed 16 bit Little Endian,
Rate 48000 Hz, Stereo
[ 3204.520251] usb 1-2: setting usb interface 1:3
[ 3204.520264] usb 1-2: Creating new playback data endpoint #3
[ 3204.520272] usb 1-2: Creating new capture sync endpoint #83
[ 3204.521162] usb 1-2: Setting params for ep #3 (type 0, 4 urbs), ret=0
[ 3204.521177] usb 1-2: Setting params for ep #83 (type 1, 4 urbs), ret=0
[ 3204.521182] usb 1-2: Starting data EP @ffff880035fce000
[ 3204.521204] usb 1-2: Starting sync EP @ffff8800bd616000
second playback to adaptive endpoint: no audio and error on terminal:
$ aplay -Dhw:1,0 ~/24_96.wav
Playing WAVE '/home/plb/24_96.wav' : Signed 24 bit Little Endian in 3bytes,
Rate 96000 Hz, Stereo
aplay: pcm_write:1939: write error: Input/output error
[ 3239.483589] usb 1-2: setting usb interface 1:1
[ 3239.483601] usb 1-2: Re-using EP 3 in iface 1,1 @ffff880035fc8000
[ 3239.484590] usb 1-2: Setting params for ep #3 (type 0, 4 urbs), ret=0
[ 3239.484606] usb 1-2: Setting params for ep #83 (type 1, 4 urbs), ret=0
This last line shows that a sync endpoint is used when it shouldn't.
The sync endpoint is no longer valid and the pointers are corrupted
Julian Scheel [Fri, 14 Aug 2015 14:14:45 +0000 (16:14 +0200)]
ALSA: usb-audio: Fix parameter block size for UAC2 control requests
USB Audio Class version 2.0 supports three different parameter block sizes for
CUR requests, which are 1 byte (5.2.3.1 Layout 1 Parameter Block), 2 bytes
(5.2.3.2 Layout 2 Parameter Block) and 4 bytes (5.2.3.3 Layout 3 Parameter
Block). Use the correct size according to the specific control as it was
already done for UACv1. The allocated block size for control requests is
increased to support the 4 byte worst case.
Takashi Iwai [Mon, 10 Aug 2015 14:53:32 +0000 (16:53 +0200)]
ALSA: hda - Fix pin config and mapping on Alienware 15
Alienware 15 has CA0132 codec for its onboard sound, but the pin
config and mapping seem quite different from other Creative boards.
This patch corrects them, at least, for providing the right headphone
and mic jack notification, as well as removing the non-existing SPDIF
pins.
Even with this fix, not all stuff works perfectly yet, mainly because
of the badly written ca0132 driver code -- it has too many implicit
assumptions of pin configs and maps. Nevertheless, this is a small
good step forward.
Mark Brown [Mon, 10 Aug 2015 12:02:53 +0000 (13:02 +0100)]
ALSA: echoaudio: Use standard C definitions of true and false
The echoaudio locally defines TRUE and FALSE. Not only is this
redundant given that C now has a boolean type it results in lots of
warnings as other headers also define these macros, causing duplicate
definitions. Fix this by removing the local defines and converting all
local users to use the standard C true and false instead, simply
removing the macros is less safe due to implicit inclusion of the other
definitons.
[fixed overlooked replacement of FALSE by tiwai]
Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Fri, 7 Aug 2015 11:53:41 +0000 (13:53 +0200)]
Merge tag 'asoc-fix-v4.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v4.2
There are a couple of small driver specific fixes here but the
overwhelming bulk of these changes are fixes to the topology ABI that
has been newly introduced in v4.2. Once this makes it into a release we
will have to firm this up but for now getting enhancements in before
they've made it into a release is the most expedient thing.
Mengdong Lin [Wed, 5 Aug 2015 13:41:14 +0000 (14:41 +0100)]
ASoC: topology: Add ops support to byte controls UAPI
Add UAPI support for setting byte control ops. Rename the ops structure
to be more generic so it can be sued by other objects too.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Mengdong Lin [Wed, 5 Aug 2015 13:41:13 +0000 (14:41 +0100)]
ASoC: topology: Update TLV support so we can support more TLV types
Currently the TLV topology structure is targeted at only supporting the
DB scale data. This patch extends support for the other TLV types so they
can be easily added at a later stage.
TLV structure is moved to common topology control header since it's a
common field for controls and can be processed in a general way.
Users must set a proper access flag for a control since it's used to
decide if the TLV field is valid and if a TLV callback is needed.
Removed the following fields from topology TLV struct:
- size/count: type can decide the size.
- numid: not needed to initialize TLV for kcontrol.
- data: replaced by the type specific struct.
Added TLV structure to generic control header and removed TLV structure
from mixer control.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Mark Brown [Thu, 6 Aug 2015 11:34:41 +0000 (12:34 +0100)]
Merge tag 'asoc-fix-v4.2-rc3' into asoc-fix-topology
ASoC: Fixes for v4.2
A lot of small fixes here, a few to the core:
- Fix for binding DAPM stream widgets on devices with prefixes assigned
to them
- Minor fixes for the newly added topology interfaces
- Locking and memory leak fixes for DAPM
- Driver specific fixes
Vinod Koul [Mon, 29 Jun 2015 16:36:46 +0000 (17:36 +0100)]
ASoC: topology: add private data to manifest
The topology file manifest should include a private data field. This
allows vendors to specify vendor data in the manifest, like
timestamps, hashes, additional information for removing platform
configuration out of drivers and making these configurable per platform
Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Update the aoa-soundbus framework to use dev_pm_ops rather than the
deprecated legacy suspend and resume callbacks.
Since there isn't anything special to do at the bus level the bus driver
does not have to implement any callbacks. The device driver core will
automatically pick up and execute the device's PM ops.
As there is only a single aoa-soundbus driver implementing suspend and
resume, update both the core and driver at the same time to avoid
unnecessary code churn.
Takashi Iwai [Wed, 5 Aug 2015 10:09:45 +0000 (12:09 +0200)]
ALSA: hda - yet another fix for Dell headset mic with ALC3266
It turned out that there are three variants of pin config values of
NID 0x17 on Dell laptops with ALC3266 (alias of ALC298): 0x90170110,
0x90170140 and 0x90170150. The first two have been already covered by
commits 703867e2f252 and 977e627684df, so this commit adds the missing
last entry.
While we're at it, rearrange the three entries in the order of pincfg
values.
Reported-by: Kailang Yang <kailang@realtek.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
ALSA: fireworks/firewire-lib: add support for recent firmware quirk
Fireworks uses TSB43CB43(IceLynx-Micro) as its IEC 61883-1/6 interface.
This chip includes ARM7 core, and loads and runs program. The firmware
is stored in on-board memory and loaded every powering-on from it.
Echo Audio ships several versions of firmwares for each model. These
firmwares have each quirk and the quirk changes a sequence of packets.
As long as I investigated, AudioFire2/AudioFire4/AudioFirePre8 have a
quirk to transfer a first packet with 0x02 in its dbc field. This causes
ALSA Fireworks driver to detect discontinuity. In this case, firmware
version 5.7.0, 5.7.3 and 5.8.0 are used.
$ dmesg
snd-fireworks fw1.0: Detect discontinuity of CIP: 00 02
These models, AudioFire8 (since Jul 2009 ) and Gibson Robot Interface
Pack series uses the same ARM binary as their firmware. Thus, this
quirk may be observed among them.
This commit adds a new member for AMDTP structure. This member represents
the value of dbc field in a first AMDTP packet. Drivers can set it with
a preferred value according to model's quirk.
Woodrow Shen [Wed, 5 Aug 2015 04:34:12 +0000 (12:34 +0800)]
ALSA: hda - Fix Dell laptop for internal mic/headset mic
The new Dell laptop with ALC3266 can't use internal microphone to
record. Also, the 3 ring headset mic doesn't work on it. For src of
patch_realtek.c, only the pin cfg of Nid 0x17 is different, so the
Nid 0x17 is added into pin quirk, and others are defined to macro
ALC298_STANDARD_PINS in common use.
Mengdong Lin [Tue, 4 Aug 2015 14:47:35 +0000 (15:47 +0100)]
ASoC: topology: fix typo in soc_tplg_kcontrol_bind_io()
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com> Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Hui Wang [Mon, 3 Aug 2015 03:03:49 +0000 (11:03 +0800)]
ALSA: hda - remove no physical connection pins from pin_quirk table
To cleanup the pin_quirk table:
- rewrite the pin_config_match(), comparing all pins on the machine
with the corresponding pins in the quirk table.
- remove all 0x4xxxxxxx pin configurations from pin_quirk table
- after removing the 0x4xxxxxxx pin configurations, some pin tables
are exactly same, so removing the redudant pin tables.
Signed-off-by: Hui Wang <hui.wang@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tomer Barletz [Sun, 2 Aug 2015 09:08:57 +0000 (02:08 -0700)]
ALSA: oxygen: Fix logical-not-parentheses warning
This fixes the following warning, that is seen with gcc 5.1:
warning: logical not is only applied to the left hand side of comparison [-Wlogical-not-parentheses].
Linus Torvalds [Mon, 3 Aug 2015 01:07:36 +0000 (18:07 -0700)]
Merge tag 'powerpc-4.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- TCE table memory calculation fix from Alexey
- Build fix for ans-lcd from Luis
- Unbalanced IRQ warning fix from Alistair
* tag 'powerpc-4.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/eeh-powernv: Fix unbalanced IRQ warning
macintosh/ans-lcd: fix build failure after module_init/exit relocation
powerpc/powernv/ioda2: Fix calculation for memory allocated for TCE table
i915: temporary fix for DP MST docking station NULL pointer dereference
Ted Ts'o reports that his Lenovo T540p ThinkPad crashes at boot if
attached to the docking station. This is a regression that he was able
to bisect to commit 8c7b5ccb7298: "drm/i915: Use atomic helpers for
computing changed flags:"
The reason seems to be the new call to drm_atomic_helper_check_modeset()
added to intel_modeset_compute_config(), which in turn calls
update_connector_routing(), and somehow ends up picking a NULL crtc for
the connector state, causing the subsequent drm_crtc_index() to OOPS.
Daniel Vetter says that the fundamental issue seems to be confusion in
the encoder selection, and this isn't the right fix, but while he chases
down the proper fix, this at least avoids the NULL pointer dereference
and makes Ted's docking station work again.
Reported-bisected-and-tested-by: Theodore Ts'o <tytso@mit.edu> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Mani Nikula <jani.nikula@linux.intel.com> Cc: Dave Airlie <airlied@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 2 Aug 2015 16:36:21 +0000 (09:36 -0700)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"A set of three fixes for the ipr driver and one fairly major one for
memory leaks in the mq path of SCSI"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: fix memory leak with scsi-mq
ipr: Fix invalid array indexing for HRRQ
ipr: Fix incorrect trace indexing
ipr: Fix locking for unit attention handling
Linus Torvalds [Sun, 2 Aug 2015 16:12:46 +0000 (09:12 -0700)]
Merge tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"Things are calming down nicely here w.r.t. fixes. This batch
includes two week's worth since I missed to send before -rc4.
Nothing particularly scary to point out, smaller fixes here and there.
Shortlog describes it pretty well"
* tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: keystone: fix dt bindings to use post div register for mainpll
ARM: nomadik: disable UART0 on Nomadik boards
ARM: dts: i.MX35: Fix can support.
ARM: OMAP2+: hwmod: Fix _wait_target_ready() for hwmods without sysc
ARM: dts: add CPU OPP and regulator supply property for exynos4210
ARM: dts: Update video-phy node with syscon phandle for exynos3250
ARM: DRA7: hwmod: fix gpmc hwmod
Al Viro [Sat, 1 Aug 2015 23:59:28 +0000 (19:59 -0400)]
link_path_walk(): be careful when failing with ENOTDIR
In RCU mode we might end up with dentry evicted just we check
that it's a directory. In such case we should return ECHILD
rather than ENOTDIR, so that pathwalk would be retries in non-RCU
mode.
Breakage had been introduced in commit b18825a - prior to that
we were looking at nd->inode, which had been fetched before
verifying that ->d_seq was still valid. That form of check
would only be satisfied if at some point the pathname prefix
would indeed have resolved to a non-directory. The fix consists
of checking ->d_seq after we'd run into a non-directory dentry,
and failing with ECHILD in case of mismatch.
Note that all branches since 3.12 have that problem...
Linus Torvalds [Sat, 1 Aug 2015 19:47:04 +0000 (12:47 -0700)]
Merge tag 'dmaengine-fix-4.2-rc5' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
"We had a regression due to reuse of descriptor so we have reverted
that.
The rest are driver fixes:
- at_hdmac and at_xdmac for residue, trannfer width, and channel config
- pl330 final fix for dma fails and overflow issue
- xgene resouce map fix
- mv_xor big endian op fix"
* tag 'dmaengine-fix-4.2-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
Revert "dmaengine: virt-dma: don't always free descriptor upon completion"
dmaengine: mv_xor: fix big endian operation in register mode
dmaengine: xgene-dma: Fix the resource map to handle overlapping
dmaengine: at_xdmac: fix transfer data width in at_xdmac_prep_slave_sg()
dmaengine: at_hdmac: fix residue computation
dmaengine: at_xdmac: fix bug about channel configuration
dmaengine: pl330: Really fix choppy sound because of wrong residue calculation
dmaengine: pl330: Fix overflow when reporting residue in memcpy
Linus Torvalds [Sat, 1 Aug 2015 16:47:11 +0000 (09:47 -0700)]
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixlets from Thomas Gleixner:
"Just two updates to the maintainers file"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
MAINTAINERS: Appoint Jiang and Marc as irqdomain maintainers
MAINTAINERS: Appoint Marc Zyngier as irqchips co-maintainer
Linus Torvalds [Sat, 1 Aug 2015 16:16:33 +0000 (09:16 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Fallout from the recent NMI fixes: make x86 LDT handling more robust.
Also some EFI fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ldt: Make modify_ldt synchronous
x86/xen: Probe target addresses in set_aliased_prot() before the hypercall
x86/irq: Use the caller provided polarity setting in mp_check_pin_attr()
efi: Check for NULL efi kernel parameters
x86/efi: Use all 64 bit of efi_memmap in setup_e820()
1) Must teardown SR-IOV before unregistering netdev in igb driver, from
Alex Williamson.
2) Fix ipv6 route unreachable crash in IPVS, from Alex Gartrell.
3) Default route selection in ipv4 should take the prefix length, table
ID, and TOS into account, from Julian Anastasov.
4) sch_plug must have a reset method in order to purge all buffered
packets when the qdisc is reset, likewise for sch_choke, from WANG
Cong.
5) Fix deadlock and races in slave_changelink/br_setport in bridging.
From Nikolay Aleksandrov.
6) mlx4 bug fixes (wrong index in port even propagation to VFs,
overzealous BUG_ON assertion, etc.) from Ido Shamay, Jack
Morgenstein, and Or Gerlitz.
7) Turn off klog message about SCTP userspace interface compat that
makes no sense at all, from Daniel Borkmann.
8) Fix unbounded restarts of inet frag eviction process, causing NMI
watchdog soft lockup messages, from Florian Westphal.
9) Suspend/resume fixes for r8152 from Hayes Wang.
10) Fix busy loop when MSG_WAITALL|MSG_PEEK is used in TCP recv, from
Sabrina Dubroca.
11) Fix performance regression when removing a lot of routes from the
ipv4 routing tables, from Alexander Duyck.
12) Fix device leak in AF_PACKET, from Lars Westerhoff.
13) AF_PACKET also has a header length comparison bug due to signedness,
from Alexander Drozdov.
14) Fix bug in EBPF tail call generation on x86, from Daniel Borkmann.
15) Memory leaks, TSO stats, watchdog timeout and other fixes to
thunderx driver from Sunil Goutham and Thanneeru Srinivasulu.
16) act_bpf can leak memory when replacing programs, from Daniel
Borkmann.
17) WOL packet fixes in gianfar driver, from Claudiu Manoil.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (79 commits)
stmmac: fix missing MODULE_LICENSE in stmmac_platform
gianfar: Enable device wakeup when appropriate
gianfar: Fix suspend/resume for wol magic packet
gianfar: Fix warning when CONFIG_PM off
act_pedit: check binding before calling tcf_hash_release()
net: sk_clone_lock() should only do get_net() if the parent is not a kernel socket
net: sched: fix refcount imbalance in actions
r8152: reset device when tx timeout
r8152: add pre_reset and post_reset
qlcnic: Fix corruption while copying
act_bpf: fix memory leaks when replacing bpf programs
net: thunderx: Fix for crash while BGX teardown
net: thunderx: Add PCI driver shutdown routine
net: thunderx: Fix crash when changing rss with mutliple traffic flows
net: thunderx: Set watchdog timeout value
net: thunderx: Wakeup TXQ only if CQE_TX are processed
net: thunderx: Suppress alloc_pages() failure warnings
net: thunderx: Fix TSO packet statistic
net: thunderx: Fix memory leak when changing queue count
net: thunderx: Fix RQ_DROP miscalculation
...
Linus Torvalds [Sat, 1 Aug 2015 00:05:37 +0000 (17:05 -0700)]
Merge branch 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"Filipe fixed up a hard to trigger ENOSPC regression from our merge
window pull, and we have a few other smaller fixes"
* 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix quick exhaustion of the system array in the superblock
btrfs: its btrfs_err() instead of btrfs_error()
btrfs: Avoid NULL pointer dereference of free_extent_buffer when read_tree_block() fail
btrfs: Fix lockdep warning of btrfs_run_delayed_iputs()
Linus Torvalds [Sat, 1 Aug 2015 00:00:25 +0000 (17:00 -0700)]
Merge tag 'sound-4.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"This became a relative big update as it includes the collected ASoC
fixes. There are a few fixes in ASoC core side, mostly for DAPM and
the new topology API. The rest are various ASoC driver-specific
fixes, as well as the usual HD-audio and USB-audio quirks"
* tag 'sound-4.2-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (29 commits)
ALSA: hda - Fix MacBook Pro 5,2 quirk
ALSA: hda - Fix race between PM ops and HDA init/probe
ALSA: usb-audio: add dB range mapping for some devices
ALSA: hda - Apply a fixup to Dell Vostro 5480
ALSA: hda - Add pin quirk for the headset mic jack detection on Dell laptop
ALSA: hda - Apply fixup for another Toshiba Satellite S50D
ALSA: fireworks: add support for AudioFire2 quirk
ALSA: hda - Fix the headset mic that will not work on Dell desktop machine
ALSA: hda - fix cs4210_spdif_automute()
ASoC: pcm1681: Fix setting de-emphasis sampling rate selection
ASoC: ssm4567: Keep TDM_BCLKS in ssm4567_set_dai_fmt
ASoC: sgtl5000: Fix up define for SGTL5000_SMALL_POP
ASoC: dapm: Don't add prefix to widget stream name
ASoC: rt5645: Check if codec is initialized in workqueue handler
ASoC: Intel: Get correct usage_count value to load firmware
ASoC: topology: Fix to add dapm mixer info
ASoC: zx: spdif: Fix devm_ioremap_resource return value check
ASoC: zx: i2s: Fix devm_ioremap_resource return value check
ASoC: mediatek: Use platform_of_node for machine drivers
ASoC: Free card DAPM context on snd_soc_instantiate_card() error path
...
Joachim Eastwood [Fri, 31 Jul 2015 17:13:22 +0000 (19:13 +0200)]
stmmac: fix missing MODULE_LICENSE in stmmac_platform
Commit 50649ab14982 ("stmmac: drop driver from stmmac platform code")
was a bit overzealous in removing code and dropped the MODULE_*
macro's that are still needed since stmmac_platform can be a module.
Fix this by putting the macro's remvoed in 50649ab14982 back.
This fixes the following errors when used as a module:
stmmac_platform: module license 'unspecified' taints kernel.
Disabling lock debugging due to kernel taint
stmmac_platform: Unknown symbol devm_kmalloc (err 0)
stmmac_platform: Unknown symbol stmmac_suspend (err 0)
stmmac_platform: Unknown symbol platform_get_irq_byname (err 0)
stmmac_platform: Unknown symbol stmmac_dvr_remove (err 0)
stmmac_platform: Unknown symbol platform_get_resource (err 0)
stmmac_platform: Unknown symbol of_get_phy_mode (err 0)
stmmac_platform: Unknown symbol of_property_read_u32_array (err 0)
stmmac_platform: Unknown symbol of_alias_get_id (err 0)
stmmac_platform: Unknown symbol stmmac_resume (err 0)
stmmac_platform: Unknown symbol stmmac_dvr_probe (err 0)
Fixes: 50649ab14982 ("stmmac: drop driver from stmmac platform code") Reported-by: Igor Gnatenko <i.gnatenko.brain@gmail.com> Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 31 Jul 2015 22:41:50 +0000 (15:41 -0700)]
Merge branch 'gianfar-wol-fixes'
Claudiu Manoil says:
====================
gianfar: wol magic packet fixes
These changes were already validated as part of FSL SDK.
Patch 2 fixes occasional wake-on magic packet failures during
traffic, probably due to incorrect traffic stop/ device halt
sequence and incorrect usage of txlock.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The wol_en flag is 0 by default anyway, and we have the
following inconsistency: a MAGIC packet wol capable eth
interface is registered as a wake-up source but unable
to wake-up the system as wol_en is 0 (wake-on flag set to 'd').
Calling set_wakeup_enable() at netdev open is just redundant
because wol_en is 0 by default.
Let only ethtool call set_wakeup_enable() for now.
The bflock is obviously obsoleted, its utility has been corroded
over time. The bitfield flags used today in gianfar are accessed
only on the init/ config path, with no real possibility of
concurrency - nothing that would justify smth. like bflock.
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
If we disable NAPI in the first place we can mask the device's
interrupts (and halt it) without fearing that imask may be
concurrently accessed from interrupt context, so there's
no need to do local_irq_save() around gfar_halt_nodisable().
lock_rx_qs()/unlock_tx_qs() are just obsoleted and potentially
buggy routines. The txlock is currently used in the driver only
to manage TX congestion, it has nothing to do with halting the
device. With these changes, the TX processing is stopped before
gfar_halt().
Compact gfar_halt() is used instead of gfar_halt_nodisable(),
as it disables Rx/TX DMA h/w blocks and the Rx/TX h/w queues.
gfar_start() re-enables all these blocks on resume. Enabling
the magic-packet mode remains the same, note that the RX block
is re-enabled just before entering sleep mode.
Add IRQF_NO_SUSPEND flag for the error interrupt line, to signal
that the interrupt line must remain active during sleep in order
to wake the system by magic packet (MAG) reception interrupt.
(On some systems the MAG interrupt did trigger w/o this flag
as well, but on others it didn't.)
Without these fixes, when suspended during fair Tx traffic the
interface occasionally failed to be woken up by magic packet.
Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
CC drivers/net/ethernet/freescale/gianfar.o
drivers/net/ethernet/freescale/gianfar.c:568:13: warning: 'lock_tx_qs'
defined but not used [-Wunused-function]
static void lock_tx_qs(struct gfar_private *priv)
^
drivers/net/ethernet/freescale/gianfar.c:576:13: warning: 'unlock_tx_qs'
defined but not used [-Wunused-function]
static void unlock_tx_qs(struct gfar_private *priv)
^
Reported-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
WANG Cong [Fri, 31 Jul 2015 00:12:21 +0000 (17:12 -0700)]
act_pedit: check binding before calling tcf_hash_release()
When we share an action within a filter, the bind refcnt
should increase, therefore we should not call tcf_hash_release().
Fixes: 1a29321ed045 ("net_sched: act: Dont increment refcnt on replace") Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Cong Wang <cwang@twopensource.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Murali Karicheri [Fri, 29 May 2015 16:04:13 +0000 (12:04 -0400)]
ARM: dts: keystone: fix dt bindings to use post div register for mainpll
All of the keystone devices have a separate register to hold post
divider value for main pll clock. Currently the fixed-postdiv
value used for k2hk/l/e SoCs works by sheer luck as u-boot happens to
use a value of 2 for this. Now that we have fixed this in the pll
clock driver change the dt bindings for the same.
Merge tag 'iommu-fixes-v4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fixes from Joerg Roedel:
"These fixes are all for the AMD IOMMU driver:
- A regression with HSA caused by the conversion of the driver to
default domains. The fixes make sure that an HSA device can still
be attached to an IOMMUv2 domain and that these domains also allow
non-IOMMUv2 capable devices.
- Fix iommu=pt mode which did not work because the dma_ops where set
to nommu_ops, which breaks devices that can only do 32bit DMA.
- Fix an issue with non-PCI devices not working, because there are no
dma_ops for them. This issue was discovered recently as new AMD
x86 platforms have non-PCI devices too"
* tag 'iommu-fixes-v4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Allow non-ATS devices in IOMMUv2 domains
iommu/amd: Set global dma_ops if swiotlb is disabled
iommu/amd: Use swiotlb in passthrough mode
iommu/amd: Allow non-IOMMUv2 devices in IOMMUv2 domains
iommu/amd: Use iommu core for passthrough mode
iommu/amd: Use iommu_attach_group()
Merge tag 'drm-intel-fixes-2015-07-31' of git://anongit.freedesktop.org/drm-intel
Pull drm intel fixes from Daniel Vetter:
"I delayed my -fixes pull a bit hoping that I could include a fix for
the dp mst stuff but looks a bit more nasty than that. So just 3
other regression fixes, one 4.2 other two cc: stable"
* tag 'drm-intel-fixes-2015-07-31' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Declare the swizzling unknown for L-shaped configurations
drm/i915: Mark PIN_USER binding as GLOBAL_BIND without the aliasing ppgtt
drm/i915: Replace WARN inside I915_READ64_2x32 with retry loop
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"This has a bunch of nouveau fixes, as Ben has been hibernating and has
lots of small fixes for lots of bugs across nouveau.
Radeon has one major fix for hdmi/dp audio regression that is larger
than Alex would like, but seems to fix up a fair few bugs, along with
some misc fixes.
And a few msm fixes, one of which is also a bit large.
But nothing in here seems insane or crazy for this stage, just more
than I'd like"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (33 commits)
drm/msm/mdp5: release SMB (shared memory blocks) in various cases
drm/msm: change to uninterruptible wait in atomic commit
drm/msm: mdp4: Fix drm_framebuffer dereference crash
drm/msm: fix msm_gem_prime_get_sg_table()
drm/amdgpu: add new parameter to seperate map and unmap
drm/amdgpu: hdp_flush is not needed for inside IB
drm/amdgpu: different emit_ib for gfx and compute
drm/amdgpu: information leak in amdgpu_info_ioctl()
drm/amdgpu: clean up init sequence for failures
drm/radeon/combios: add some validation of lvds values
drm/radeon: rework audio modeset to handle non-audio hdmi features
drm/radeon: rework audio detect (v4)
drm/amdgpu: Drop drm/ prefix for including drm.h in amdgpu_drm.h
drm/radeon: Drop drm/ prefix for including drm.h in radeon_drm.h
drm/nouveau/nouveau/ttm: fix tiled system memory with Maxwell
drm/nouveau/kms/nv50-: guard against enabling cursor on disabled heads
drm/nouveau/fbcon/g80: reduce PUSH_SPACE alloc, fire ring on accel init
drm/nouveau/fbcon/gf100-: reduce RING_SPACE allocation
drm/nouveau/fbcon/nv11-: correctly account for ring space usage
drm/nouveau/bios: add proper support for opcode 0x59
...
Jun Nie [Fri, 10 Jul 2015 12:02:49 +0000 (20:02 +0800)]
Revert "dmaengine: virt-dma: don't always free descriptor upon completion"
This reverts commit b9855f03d560d351e95301b9de0bc3cad3b31fe9.
The patch break existing DMA usage case. For example, audio SOC
dmaengine never release channel and cause virt-dma to cache too
much memory in descriptor to exhaust system memory.
dmaengine: mv_xor: fix big endian operation in register mode
Commit 6f166312c6ea2 ("dmaengine: mv_xor: add support for a38x command
in descriptor mode") introduced the support for a feature that
appeared in Armada 38x: specifying the operation to be performed in a
per-descriptor basis rather than globally per channel.
However, when doing so, it changed the function mv_chan_set_mode() to
use:
if (IS_ENABLED(__BIG_ENDIAN))
instead of:
#if defined(__BIG_ENDIAN)
While IS_ENABLED() is perfectly fine for CONFIG_* symbols, it is not
for other symbols such as __BIG_ENDIAN that is provided directly by
the compiler. Consequently, the commit broke support for big-endian,
as the XOR_DESCRIPTOR_SWAP flag was not set in the XOR channel
configuration register.
The primarily visible effect was some nasty warnings and failures
appearing during the self-test of the XOR unit:
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Fixes: 6f166312c6ea2 ("dmaengine: mv_xor: add support for a38x command in descriptor mode") Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: xgene-dma: Fix the resource map to handle overlapping
There is an overlap in dma ring cmd csr region due to sharing of ethernet
ring cmd csr region. This patch fix the resource overlapping by mapping
the entire dma ring cmd csr region.
Cyrille Pitchen [Tue, 30 Jun 2015 12:36:57 +0000 (14:36 +0200)]
dmaengine: at_xdmac: fix transfer data width in at_xdmac_prep_slave_sg()
This patch adds the missing update of the transfer data width in
at_xdmac_prep_slave_sg().
Indeed, for each item in the scatter-gather list, we check whether the
transfer length is aligned with the data width provided by
dmaengine_slave_config(). If so, we directly use this data width for the
current part of the transfer we are preparing. Otherwise, the data width
is reduced to 8 bits (1 byte). Of course, the actual number of register
accesses must also be updated to match the new data width.
So one chunk was missing in the original patch (see Fixes tag below): the
number of register accesses was correctly set to (len >> fixed_dwidth) in
mbr_ubc but the real data width was not updated in mbr_cfg. Since mbr_cfg
may change for each part of the scatter-gather transfer this also explains
why the original patch used the Descriptor View 2 instead of the
Descriptor View 1.
Let's take the example of a DMA transfer to write 8bit data into an Atmel
USART with FIFOs. When FIFOs are enabled in the USART, its Transmit
Holding Register (THR) works in multidata mode, that is to say that up to
4 8bit data can be written into the THR in a single 32bit access and it is
still possible to write only one data with a 8bit access. To take
advantage of this new feature, the DMA driver was modified to allow
multiple dwidths when doing slave transfers.
For instance, when the total length is 22 bytes, the USART driver splits
the transfer into 2 parts:
First part: 20 bytes transferred through 5 32bit writes into THR
Second part: 2 bytes transferred though 2 8bit writes into THR
For the second part, the data width was first set to 4_BYTES by the USART
driver thanks to dmaengine_slave_config() then at_xdmac_prep_slave_sg()
reduces this data width to 1_BYTE because the 2 byte length is not aligned
with the original 4_BYTES data width. Since the data width is modified,
the actual number of writes into THR must be set accordingly.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com> Fixes: 6d3a7d9e3ada ("dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers") Cc: stable@vger.kernel.org #4.0 and later Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Cyrille Pitchen [Thu, 18 Jun 2015 11:25:41 +0000 (13:25 +0200)]
dmaengine: at_hdmac: fix residue computation
As claimed by the programmer datasheet and confirmed by the IP designer,
the Block Transfer Size (BTSIZE) bitfield of the Channel x Control A
Register (CTRLAx) always refers to a number of Source Width (SRC_WIDTH)
transfers.
Both the SRC_WIDTH and BTSIZE bitfields can be extacted from the CTRLAx
register to compute the DMA residue. So the 'tx_width' field is useless
and can be removed from the struct at_desc.
Before this patch, atc_prep_slave_sg() was not consistent: BTSIZE was
correctly initialized according to the SRC_WIDTH but 'tx_width' was always
set to reg_width, which was incorrect for MEM_TO_DEV transfers. It led to
bad DMA residue when 'tx_width' != SRC_WIDTH.
Also the 'tx_width' field was mostly set only in the first and last
descriptors. Depending on the kind of DMA transfer, this field remained
uninitialized for intermediate descriptors. The accurate DMA residue was
computed only when the currently processed descriptor was the first or the
last of the chain. This algorithm was a little bit odd. An accurate DMA
residue can always be computed using the SRC_WIDTH and BTSIZE bitfields
in the CTRLAx register.
Finally, the test to check whether the currently processed descriptor is
the last of the chain was wrong: for cyclic transfer, last_desc->lli.dscr
is NOT equal to zero, since set_desc_eol() is never called, but logically
equal to first_desc->txd.phys. This bug has a side effect on the
drivers/tty/serial/atmel_serial.c driver, which uses cyclic DMA transfer
to receive data. Since the DMA residue was wrong each time the DMA
transfer reaches the second (and last) period of the transfer, no more
data were received by the USART driver till the cyclic DMA transfer loops
back to the first period.
dmaengine: at_xdmac: fix bug about channel configuration
When using descriptor view 2 or higher, we don't write the configuration
into AT_XDMAC_CC register because this configuration will be fetch from
the descriptor. Unfortunately, the PROT bit is not updated with this
method, we have to do it manually before enabling the channel.
iommu/amd: Allow non-ATS devices in IOMMUv2 domains
With the grouping of multi-function devices a non-ATS
capable device might also end up in the same domain as an
IOMMUv2 capable device.
So handle this situation gracefully and don't consider it a
bug anymore.
projects / linux-beck.git / log