[media] v4l: Validate fields in the core code for subdev EDID ioctls

The subdev EDID ioctls receive a pad field that must reference an
existing pad and an EDID field that must point to a buffer. Validate
both fields in the core code instead of duplicating validation in all
drivers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/media/i2c/adv7511.c b/drivers/media/i2c/adv7511.c
index d77a1db4f94d..f98acf4aafd4 100644
--- a/drivers/media/i2c/adv7511.c
+++ b/drivers/media/i2c/adv7511.c
@@ -783,8 +783,6 @@ static int adv7511_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
                 return -EINVAL;
         if ((edid->blocks == 0) || (edid->blocks > 256))
                 return -EINVAL;
-        if (!edid->edid)
-                return -EINVAL;
         if (!state->edid.segments) {
                 v4l2_dbg(1, debug, sd, "EDID segment 0 not found\n");
                 return -ENODATA;