Hi Hans, Thank you for the patch. On Tuesday, 30 January 2018 17:18:32 EET Hans Verkuil wrote: > If the device is of type VFL_TYPE_SUBDEV then vdev->ioctl_ops > is NULL so the 'if (!ops->vidioc_query_ext_ctrl)' check would fail. More than that, it would crash. > Add a test for !ops to the condition. > > All sub-devices that have controls will use the control framework, > so they do not have an equivalent to ops->vidioc_query_ext_ctrl. > Returning false if ops is NULL is the correct thing to do here. > > Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> This is missing a Fixes: tag, and a Reported-by: tag would be nice too. Apart from that, Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c > b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c index > bdb5c226d01c..5198c9eeb348 100644 > --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c > +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c > @@ -770,7 +770,7 @@ static inline bool ctrl_is_pointer(struct file *file, > u32 id) return ctrl && ctrl->is_ptr; > } > > - if (!ops->vidioc_query_ext_ctrl) > + if (!ops || !ops->vidioc_query_ext_ctrl) > return false; > > return !ops->vidioc_query_ext_ctrl(file, fh, &qec) && -- Regards, Laurent Pinchart
