media: bttv: don't setup the controls if there are no video devices

commit f8e1b699a5504a2da05834c7cfdddb125a8ce088 upstream.

The no_video flag was checked in all other cases except one. Calling
v4l2_ctrl_handler_setup() if no_video is 1 will crash.
This wasn't noticed before since there are only two card types that
set no_video to 1, so this type of hardware is quite rare.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Lorenz Röhrl <sheepshit@gmx.de>
Tested-by: Lorenz Röhrl <sheepshit@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/pci/bt8xx/bttv-driver.c b/drivers/media/pci/bt8xx/bttv-driver.c
index e7d08841341141b67871d6916f570c76ea15fbec..e2633d9270b7514d9d0ba1d8ed27cb73f5e42724 100644 (file)
--- a/drivers/media/pci/bt8xx/bttv-driver.c
+++ b/drivers/media/pci/bt8xx/bttv-driver.c
@@ -4226,7 +4226,8 @@ static int bttv_probe(struct pci_dev *dev, const struct pci_device_id *pci_id)
        }
        btv->std = V4L2_STD_PAL;
        init_irqreg(btv);
-       v4l2_ctrl_handler_setup(hdl);
+       if (!bttv_tvcards[btv->c.type].no_video)
+               v4l2_ctrl_handler_setup(hdl);
        if (hdl->error) {
                result = hdl->error;
                goto fail2;