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ALSA: seq: correctly detect input buffer overflow 

snd_seq_event_dup returns -ENOMEM in some buffer-full conditions,
but usually returns -EAGAIN. Make -EAGAIN trigger the overflow
condition in snd_seq_fifo_event_in so that the fifo is cleared
and -ENOSPC is returned to userspace as stated in the alsa-lib docs.

Signed-off-by: Adam Goode <agoode@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Adam Goode 2014-06-04 01:02:51 -04:00 committed by Takashi Iwai
parent 16088cb6c0
commit 21fd3e956e
1 changed files with 1 additions and 1 deletions
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2
sound/core/seq/seq_fifo.c
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@ -124,7 +124,7 @@ int snd_seq_fifo_event_in(struct snd_seq_fifo *f,
snd_use_lock_use(&f->use_lock);
err = snd_seq_event_dup(f->pool, event, &cell, 1, NULL); /* always non-blocking */
if (err < 0) {
if (err == -ENOMEM)
if ((err == -ENOMEM) || (err == -EAGAIN))
atomic_inc(&f->overflow);
snd_use_lock_free(&f->use_lock);
return err;