ALSA: hda - Distinguish each substream for better sticky assignment

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The commit ef18beded8 introduced a
mechanism to assign the previously used slot for the next reopen of a
PCM stream.  But the PCM device number isn't always unique (it may
have multiple substreams), and also the code doesn't check the stream
direction, thus both playback and capture streams share the same
device number.

For avoiding this conflict, make a unique key for each substream and
store/check this value at reopening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

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This commit is contained in:

Takashi Iwai 2011-10-06 10:07:58 +02:00

parent 97999e28c7

commit d5cf991198

1 changed files with 6 additions and 3 deletions

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sound/pci/hda/hda_intel.c

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