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authorTakashi Iwai <tiwai@suse.de>2009-08-20 16:40:16 +0200
committerTakashi Iwai <tiwai@suse.de>2009-08-20 16:40:16 +0200
commit4cdc115fd38b54642e8536a5c2389483bcb9b2e9 (patch)
treee68cfe5e88d155d1a6820b563517dac27b8e6dd6 /sound/soc/codecs/cs4270.c
parent64f1607ffbbc772685733ea63e6f7f4183df1b16 (diff)
downloadblackbird-op-linux-4cdc115fd38b54642e8536a5c2389483bcb9b2e9.tar.gz
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ALSA: pcm - Fix drain behavior in non-blocking mode
The current PCM core has the following problems regarding PCM draining in non-blocking mode: - the current f_flags isn't checked in snd_pcm_drain(), thus changing the mode dynamically via snd_pcm_nonblock() after open doesn't work. - calling drain in non-blocking mode just return -EAGAIN error, but doesn't provide any way to sync with draining. This patch fixes these issues. - check file->f_flags in snd_pcm_drain() properly - when O_NONBLOCK is set, PCM core sets the stream(s) to DRAIN state but quits ioctl immediately without waiting the whole drain; the caller can sync the drain manually via poll() Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/soc/codecs/cs4270.c')
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