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V4L/DVB (11896): em28xx: Fix for Slow Memory Leak

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Test Code:  (Provided by Douglas)

v4l-dvb/v4l2-apps/test/stress-buffer.c

The audio DMA area was never being freed and would slowly leak over
time as the v4l device was opened and closed by an application.

Thanks again to Douglas for generating the test code to help locate
memory leaks!!!

Signed-off-by: Robert Krakora <rob.krakora@messagenetsystems.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Robert Krakora 2009-05-28 11:16:19 -03:00 • committed by Mauro Carvalho Chehab
parent f41b696156
commit 75c74d1c78
1 changed files with 5 additions and 0 deletions
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5
drivers/media/video/em28xx/em28xx-audio.c
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@ -339,6 +339,11 @@ static int snd_em28xx_pcm_close(struct snd_pcm_substream *substream)
mutex_lock(&dev->lock);
dev->adev.users--;
em28xx_audio_analog_set(dev);
if (substream->runtime->dma_area) {
dprintk("freeing\n");
vfree(substream->runtime->dma_area);
substream->runtime->dma_area = NULL;
}
mutex_unlock(&dev->lock);
return 0;