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

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>

1 files changed, 5 insertions, 13 deletions

diff --git a/drivers/media/video/cx18/cx18-alsa-pcm.c b/drivers/media/video/cx18/cx18-alsa-pcm.c
index 06862a69c7b0..cfa512112ca0 100644
--- a/drivers/media/video/cx18/cx18-alsa-pcm.c
+++ b/drivers/media/video/cx18/cx18-alsa-pcm.c
@@ -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;
         }