diff options
| author | Takashi Iwai <tiwai@suse.de> | 2012-11-08 14:36:18 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-17 13:16:36 -0800 |
| commit | 32896690903c576809f21724115612a82a102a52 (patch) | |
| tree | 096dbdeeb7c8711727f74fa431abd8124c02d100 /sound/core/sound_oss.c | |
| parent | 13ec0431e7523a5a2d45dd6513b12b5f6b4ddec9 (diff) | |
ALSA: Fix card refcount unbalance
commit 8bb4d9ce08b0a92ca174e41d92c180328f86173f upstream.
There are uncovered cases whether the card refcount introduced by the
commit a0830dbd isn't properly increased or decreased:
- OSS PCM and mixer success paths
- When lookup function gets NULL
This patch fixes these places.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=50251
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/core/sound_oss.c')
| -rw-r--r-- | sound/core/sound_oss.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/core/sound_oss.c b/sound/core/sound_oss.c index 7442c7ac246..ec86009141d 100644 --- a/sound/core/sound_oss.c +++ b/sound/core/sound_oss.c @@ -54,7 +54,7 @@ void *snd_lookup_oss_minor_data(unsigned int minor, int type) mreg = snd_oss_minors[minor]; if (mreg && mreg->type == type) { private_data = mreg->private_data; - if (mreg->card_ptr) + if (private_data && mreg->card_ptr) atomic_inc(&mreg->card_ptr->refcount); } else private_data = NULL; |