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Commit 231ffc9c authored by Devin Heitmueller's avatar Devin Heitmueller Committed by Mauro Carvalho Chehab
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V4L/DVB (9920): em28xx: fix NULL pointer dereference in call to VIDIOC_INT_RESET command 



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: default avatarDevin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent a67534a7

drivers/media/video/em28xx/em28xx-video.c

+2 −1
Original line number Diff line number Diff line
@@ -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);

}