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V4L/DVB: cx18: Fix memory leak in cx18-alsa starting of PCM captures

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The cx18_open_id is normally dynamically allocated and stored in the
filp->private_data for v4l2 file operations.  The cx18-alsa routines should
not dynamically allocate a cx18_open_id because they never store it anywhere
and never free it.  This change fixes that and plugs a memory leak.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls 2010-01-30 15:50:51 -03:00 committed by Mauro Carvalho Chehab
parent b4729dcbba
commit 831f476cee
1 changed files with 5 additions and 13 deletions
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18
drivers/media/video/cx18/cx18-alsa-pcm.c
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@ -152,28 +152,20 @@ static int snd_cx18_pcm_capture_open(struct snd_pcm_substream *substream)
struct v4l2_device *v4l2_dev = cxsc->v4l2_dev;
struct cx18 *cx = to_cx18(v4l2_dev);
struct cx18_stream *s;
struct cx18_open_id *item;
struct cx18_open_id item;
int ret;
/* Instruct the cx18 to start sending packets */
snd_cx18_lock(cxsc);
s = &cx->streams[CX18_ENC_STREAM_TYPE_PCM];
/* Allocate memory */
item = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL);
if (NULL == item) {
snd_cx18_unlock(cxsc);
return -ENOMEM;
}
item->cx = cx;
item->type = s->type;
item->open_id = cx->open_id++;
item.cx = cx;
item.type = s->type;
item.open_id = cx->open_id++;
/* See if the stream is available */
if (cx18_claim_stream(item, item->type)) {
if (cx18_claim_stream(&item, item.type)) {
/* No, it's already in use */
kfree(item);
snd_cx18_unlock(cxsc);
return -EBUSY;
}