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V4L/DVB (9920): em28xx: fix NULL pointer dereference in call to VIDIOC_INT_RESET command

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Fix a NULL pointer dereference that would occur if the video decoder tied to
the em28xx supports the VIDIOC_INT_RESET call (for example: the cx25840 driver)

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2008-12-16 23:09:35 -03:00 committed by Mauro Carvalho Chehab
parent a67534a782
commit 231ffc9c07
1 changed files with 2 additions and 1 deletions
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3
drivers/media/video/em28xx/em28xx-video.c
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@ -549,10 +549,11 @@ static int em28xx_config(struct em28xx *dev)
static void em28xx_config_i2c(struct em28xx *dev)
{
struct v4l2_routing route;
int zero = 0;
route.input = INPUT(dev->ctl_input)->vmux;
route.output = 0;
em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, &zero);
em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
}