• Vinod Koul's avatar
    ALSA: compress: fix drain calls blocking other compress functions (v6) · f44f2a54
    Vinod Koul authored
    The drain and drain_notify callback were blocked by low level driver
    until the draining was complete. Due to this being invoked with big
    fat mutex held, others ops like reading timestamp, calling pause, drop
    were blocked.
    So to fix this we add a new snd_compr_drain_notify() API. This would
    be required to be invoked by low level driver when drain or partial
    drain has been completed by the DSP. Thus we make the drain and
    partial_drain callback as non blocking and driver returns immediately
    after notifying DSP.  The waiting is done while releasing the lock so
    that other ops can go ahead.
    [ The commit 917f4b5c was wrongly applied from the preliminary
      patch.  This commit corrects to the final version.
      Sorry for inconvenience!  -- tiwai ]
    Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
    CC: stable@vger.kernel.org
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
compress_offload.c 25.9 KB