From 40e343208b727f5892249997691000847ec63dc3 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Fri, 9 Jan 2009 22:59:27 -0300 Subject: V4L/DVB (10218): cx23885: Fix Oops for mixed install of analog and digital only cards commit cd8f894eacf13996d920fdd2aef1afc55156b191 upstream. Analog support for HVR-1250 has not been completed, but does exist for the HVR-1800. Since both cards use the same driver, it tries to create the analog dev for both devices, which is not possible. This causes a NULL error to show up in video_open and mpeg_open. -Mark Iterations through the cx23885_devlist must check for NULL pointers as some supported devices only have DVB support at the moment. Mark Jenks encoutered an Oops in a system with both an HVR-1250 and HVR-1800 installed. -Andy Reported-by: Mark Jenks Tested-by: Mark Jenks Signed-off-by: Mark Jenks Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Jarod Wilson Signed-off-by: Greg Kroah-Hartman --- drivers/media/video/cx23885/cx23885-417.c | 3 ++- drivers/media/video/cx23885/cx23885-video.c | 5 +++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/media/video/cx23885/cx23885-417.c b/drivers/media/video/cx23885/cx23885-417.c index 00831f3ef8f5..c38857950301 100644 --- a/drivers/media/video/cx23885/cx23885-417.c +++ b/drivers/media/video/cx23885/cx23885-417.c @@ -1585,7 +1585,8 @@ static int mpeg_open(struct inode *inode, struct file *file) lock_kernel(); list_for_each(list, &cx23885_devlist) { h = list_entry(list, struct cx23885_dev, devlist); - if (h->v4l_device->minor == minor) { + if (h->v4l_device && + h->v4l_device->minor == minor) { dev = h; break; } diff --git a/drivers/media/video/cx23885/cx23885-video.c b/drivers/media/video/cx23885/cx23885-video.c index c742a10be5cb..0aabc53c2d68 100644 --- a/drivers/media/video/cx23885/cx23885-video.c +++ b/drivers/media/video/cx23885/cx23885-video.c @@ -730,12 +730,13 @@ static int video_open(struct inode *inode, struct file *file) lock_kernel(); list_for_each(list, &cx23885_devlist) { h = list_entry(list, struct cx23885_dev, devlist); - if (h->video_dev->minor == minor) { + if (h->video_dev && + h->video_dev->minor == minor) { dev = h; type = V4L2_BUF_TYPE_VIDEO_CAPTURE; } if (h->vbi_dev && - h->vbi_dev->minor == minor) { + h->vbi_dev->minor == minor) { dev = h; type = V4L2_BUF_TYPE_VBI_CAPTURE; } -- cgit v1.2.1