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authorClemens Ladisch <clemens@ladisch.de>2009-11-02 09:35:44 +0100
committerTakashi Iwai <tiwai@suse.de>2009-11-06 14:32:06 +0100
commit25d27eded1f4fc728e64f443adc339b5229be5d7 (patch)
treeb738266467fc0f85d9f7f29e439dfff8e33da4c0 /sound/core/pcm.c
parent31cef7076ed9409a33f19ea372d6dc5fdefe27ae (diff)
downloadlinux-linaro-stable-25d27eded1f4fc728e64f443adc339b5229be5d7.tar.gz
control: use reference-counted pid
Instead of storing the PID number, take a reference to the task's pid structure. This protects against duplicates due to PID overflows, and using pid_vnr() ensures that the PID returned by snd_ctl_elem_info() is correct as seen from the current namespace. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm.c')
-rw-r--r--sound/core/pcm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index c69c60b2a48a..8e2c7833614c 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -809,7 +809,7 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
card = pcm->card;
read_lock(&card->ctl_files_rwlock);
list_for_each_entry(kctl, &card->ctl_files, list) {
- if (kctl->pid == current->pid) {
+ if (kctl->pid == task_pid(current)) {
prefer_subdevice = kctl->prefer_pcm_subdevice;
if (prefer_subdevice != -1)
break;