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ALSA: firewire-lib: suppress kernel warnings when releasing uninitialized stream data

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When any of AMDTP stream data are not initialized and private data is
going to be released, WARN_ON() in amdtp_stream_destroy() is hit and
dump messages. This may take users irritated.

This commit fixes the bug to skip releasing when it's not initialized.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2016-03-31 08:47:02 +09:00 committed by Takashi Iwai
parent 97cc2ed27e
commit 44c376b959
1 changed files with 4 additions and 0 deletions
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4
sound/firewire/amdtp-stream.c
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@ -102,6 +102,10 @@ EXPORT_SYMBOL(amdtp_stream_init);
*/
void amdtp_stream_destroy(struct amdtp_stream *s)
{
/* Not initialized. */
if (s->protocol == NULL)
return;
WARN_ON(amdtp_stream_running(s));
kfree(s->protocol);
mutex_destroy(&s->mutex);