linux-stable.git/sound, branch v3.0.53

ASoC: dapm: Use card_list during DAPM shutdown

2012-11-26T19:34:34+00:00

commit 445632ad6dda42f4d3f9df2569a852ca0d4ea608 upstream.

DAPM shutdown incorrectly uses "list" field of codec struct while
iterating over probed components (codec_dev_list). "list" field
refers to codecs registered in the system, "card_list" field is
used for probed components.

Signed-off-by: Misael Lopez Cruz 
Signed-off-by: Liam Girdwood 
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

ASoC: wm8978: pll incorrectly configured when codec is master

2012-11-26T19:34:34+00:00

commit 55c6f4cb6ef49afbb86222c6a3ff85329199c729 upstream.

When MCLK is supplied externally and BCLK and LRC are configured as outputs
(codec is master), the PLL values are only calculated correctly on the first
transmission.  On subsequent transmissions, at differenct sample rates, the
wrong PLL values are used.  Test for f_opclk instead of f_pllout to determine
if the PLL values are needed.

Signed-off-by: Eric Millbrandt 
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

ALSA: hda - Force to reset IEC958 status bits for AD codecs

2012-11-26T19:34:33+00:00

commit ae24c3191ba2ab03ec6b4be323e730e00404b4b6 upstream.

Several bug reports suggest that the forcibly resetting IEC958 status
bits is required for AD codecs to get the SPDIF output working
properly after changing streams.

Original fix credit to Javeed Shaikh.

BugLink: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/359361

Reported-by: Robin Kreis 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: hda: Cirrus: Fix coefficient index for beep configuration

2012-11-26T19:34:33+00:00

commit 5a83b4b5a391f07141b157ac9daa51c409e71ab5 upstream.

Signed-off-by: Alexander Stein 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Fix mutex deadlock at disconnection

2012-11-17T21:14:26+00:00

commit 10e44239f67d0b6fb74006e61a7e883b8075247a upstream.

The recent change for USB-audio disconnection race fixes introduced a
mutex deadlock again.  There is a circular dependency between
chip->shutdown_rwsem and pcm->open_mutex, depicted like below, when a
device is opened during the disconnection operation:

A. snd_usb_audio_disconnect() ->
     card.c::register_mutex ->
       chip->shutdown_rwsem (write) ->
         snd_card_disconnect() ->
           pcm.c::register_mutex ->
             pcm->open_mutex

B. snd_pcm_open() ->
     pcm->open_mutex ->
       snd_usb_pcm_open() ->
         chip->shutdown_rwsem (read)

Since the chip->shutdown_rwsem protection in the case A is required
only for turning on the chip->shutdown flag and it doesn't have to be
taken for the whole operation, we can reduce its window in
snd_usb_audio_disconnect().

Reported-by: Jiri Slaby 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: Fix card refcount unbalance

2012-11-17T21:14:26+00:00

commit 8bb4d9ce08b0a92ca174e41d92c180328f86173f upstream.

There are uncovered cases whether the card refcount introduced by the
commit a0830dbd isn't properly increased or decreased:
- OSS PCM and mixer success paths
- When lookup function gets NULL

This patch fixes these places.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=50251

Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: Avoid endless sleep after disconnect

2012-11-17T21:14:22+00:00

commit 0914f7961babbf28aaa2f19b453951fb4841c03f upstream.

When disconnect callback is called, each component should wake up
sleepers and check card->shutdown flag for avoiding the endless sleep
blocking the proper resource release.

Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: Add a reference counter to card instance

2012-11-17T21:14:22+00:00

commit a0830dbd4e42b38aefdf3fb61ba5019a1a99ea85 upstream.

For more strict protection for wild disconnections, a refcount is
introduced to the card instance, and let it up/down when an object is
referred via snd_lookup_*() in the open ops.

The free-after-last-close check is also changed to check this refcount
instead of the empty list, too.

Reported-by: Matthieu CASTET 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Fix races at disconnection in mixer_quirks.c

2012-11-17T21:14:22+00:00

commit 888ea7d5ac6815ba16b3b3a20f665a92c7af6724 upstream.

Similar like the previous commit, cover with chip->shutdown_rwsem
and chip->shutdown checks.

Reported-by: Matthieu CASTET 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: usb-audio: Use rwsem for disconnect protection

2012-11-17T21:14:22+00:00

commit 34f3c89fda4fba9fe689db22253ca8db2f5e6386 upstream.

Replace mutex with rwsem for codec->shutdown protection so that
concurrent accesses are allowed.

Also add the protection to snd_usb_autosuspend() and
snd_usb_autoresume(), too.

Reported-by: Matthieu CASTET 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman