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  1. 02 Oct, 2008 1 commit
  3. 30 Sep, 2008 2 commits
  5. 29 Sep, 2008 2 commits
  7. 25 Sep, 2008 2 commits
    • Takashi Iwai's avatar
      ALSA: remove unneeded power_mutex lock in snd_pcm_drop · 24e8fc49
      Takashi Iwai authored 
      The power_mutex lock in snd_pcm_drop may cause a possible deadlock
chain, and above all, it's unneeded.  Let's get rid of it.
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      24e8fc49
    • Takashi Iwai's avatar
      ALSA: fix locking in snd_pcm_open*() and snd_rawmidi_open*() · 399ccdc1
      Takashi Iwai authored 
      The PCM and rawmidi open callbacks have a lock against card->controls_list
but it takes a wrong one, card->controls_rwsem, instead of a right one
card->ctl_files_rwlock.  This patch fixes them.

This change also fixes automatically the potential deadlocks due to
mm->mmap_sem in munmap and copy_from/to_user, reported by Sitsofe
Wheeler:

  A: snd_ctl_elem_user_tlv(): card->controls_rwsem => mm->mmap_sem
  B: snd_pcm_open(): card->open_mutex => card->controls_rwsem
  C: munmap: mm->mmap_sem => snd_pcm_release(): card->open_mutex

The patch breaks the chain.
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      399ccdc1
  9. 23 Sep, 2008 1 commit
  11. 22 Sep, 2008 1 commit
  13. 06 Sep, 2008 1 commit
  15. 02 Sep, 2008 2 commits
  17. 01 Sep, 2008 2 commits
  19. 29 Aug, 2008 1 commit
    • Clemens Ladisch's avatar
      ALSA: oxygen: fix distorted output on AK4396-based cards · df91bc23
      Clemens Ladisch authored 
      When changing the sample rate, the CMI8788's master clock output becomes
unstable for a short time.  The AK4396 needs the master clock to do SPI
writes, so writing to an AK4396 control register directly after a sample
rate change will garble the value.  In our case, this leads to the DACs
being misconfigured to I2S sample format, which results in a wrong
output level and horrible distortions on samples louder than -6 dB.

To fix this, we need to wait until the new master clock signal has
become stable before doing SPI writes.
Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
      df91bc23
  21. 27 Aug, 2008 1 commit
  23. 26 Aug, 2008 4 commits
  25. 25 Aug, 2008 20 commits