ALSA: pcm: Fix mutex unbalance in OSS emulation ioctls

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commit f6d297df4d upstream.

The previous fix 40cab6e88c ("ALSA: pcm: Return -EBUSY for OSS
ioctls changing busy streams") introduced some mutex unbalance; the
check of runtime->oss.rw_ref was inserted in a wrong place after the
mutex lock.

This patch fixes the inconsistency by rewriting with the helper
functions to lock/unlock parameters with the stream check.

Fixes: 40cab6e88c ("ALSA: pcm: Return -EBUSY for OSS ioctls changing busy streams")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Takashi Iwai 2018-03-27 14:32:23 +02:00 • committed by Greg Kroah-Hartman

parent 048747b048

commit 157113cb7c

1 changed files with 42 additions and 25 deletions

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sound/core/oss/pcm_oss.c

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