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ALSA: pcm: Call ack() whenever appl_ptr is updated
Although the ack callback is supposed to be called at each appl_ptr or hw_ptr update, we missed a few opportunities: namely, forward, rewind and sync_ptr. Formerly calling ack at rewind may have leaded to unexpected results due to the forgotten negative appl_ptr update in indirect-PCM helper, which is the major user of the PCM ack callback. But now we fixed this oversights, thus we can call ack callback safely even at rewind callback -- of course with the proper handling of the error from the callback. This patch adds the calls of ack callback in the places mentioned in the above. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Takashi Iwai
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May 25, 2017
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