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| author | Robert Krakora <rob.krakora@messagenetsystems.com> | 2009-01-16 11:23:25 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-01-29 08:38:43 -0200 |
| commit | 53d12e5a56934c31ca59f3b6f127e5a68e645fd2 (patch) | |
| tree | 00d0cbf7ac06e3a986b9478dbac72a86b8f88b80 /drivers/media | |
| parent | ba390f005573bdf6ab7fd78bb05119036c2ed539 (diff) | |
| download | linux-53d12e5a56934c31ca59f3b6f127e5a68e645fd2.tar.gz linux-53d12e5a56934c31ca59f3b6f127e5a68e645fd2.tar.bz2 linux-53d12e5a56934c31ca59f3b6f127e5a68e645fd2.zip | |
V4L/DVB (10254): em28xx: Fix audio URB transfer buffer race condition
em28xx: Fix audio URB transfer buffer memory leak and race
condition/corruption of capture pointer
Leak fix kindly contributed by Pádraig Brady.
Signed-off-by: Robert Krakora <rob.krakora@messagenetsystems.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-audio.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c index 94378ccb7505..4df6d3288424 100644 --- a/drivers/media/video/em28xx/em28xx-audio.c +++ b/drivers/media/video/em28xx/em28xx-audio.c @@ -65,6 +65,9 @@ static int em28xx_isoc_audio_deinit(struct em28xx *dev) usb_unlink_urb(dev->adev.urb[i]); usb_free_urb(dev->adev.urb[i]); dev->adev.urb[i] = NULL; + + kfree(dev->adev.transfer_buffer[i]); + dev->adev.transfer_buffer[i] = NULL; } return 0; @@ -389,11 +392,15 @@ static int snd_em28xx_capture_trigger(struct snd_pcm_substream *substream, static snd_pcm_uframes_t snd_em28xx_capture_pointer(struct snd_pcm_substream *substream) { - struct em28xx *dev; + unsigned long flags; + struct em28xx *dev; snd_pcm_uframes_t hwptr_done; + dev = snd_pcm_substream_chip(substream); + spin_lock_irqsave(&dev->adev.slock, flags); hwptr_done = dev->adev.hwptr_done_capture; + spin_unlock_irqrestore(&dev->adev.slock, flags); return hwptr_done; } |