ALSA: firewire-lib: suppress kernel warnings when releasing uninitialized stream data
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>
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index ed29026..4484242 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -102,6 +102,10 @@
*/
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);