[media] cx231xx: Fix memory leak

dma_area needs to be freed when the device is closed.

Based on em23xx-audio.c

Signed-off-by: Jean-Baptiste Theou <jtheou@adeneo-embedded.us>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/usb/cx231xx/cx231xx-audio.c b/drivers/media/usb/cx231xx/cx231xx-audio.c
index de4ae5eb4830bc4ce6c5c1513bf7f3b29bfa09a6..a6a9508418f8eebef0a4ae41c1e312610afb598c 100644 (file)
--- a/drivers/media/usb/cx231xx/cx231xx-audio.c
+++ b/drivers/media/usb/cx231xx/cx231xx-audio.c
@@ -499,6 +499,11 @@ static int snd_cx231xx_pcm_close(struct snd_pcm_substream *substream)
        }
 
        dev->adev.users--;
+       if (substream->runtime->dma_area) {
+               dev_dbg(dev->dev, "freeing\n");
+               vfree(substream->runtime->dma_area);
+               substream->runtime->dma_area = NULL;
+       }
        mutex_unlock(&dev->lock);
 
        if (dev->adev.users == 0 && dev->adev.shutdown == 1) {