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Subject: [media] uvcvideo: remove unneeded access_ok() check
Author:  Dan Carpenter <[email protected]>
Date:    Wed Mar 21 02:35:23 2012 -0300

copy_in_user() already checks for write permission, so we don't need to
do it here.  This was added in 1a5e4c867c "[media] uvcvideo: Implement
compat_ioctl32 for custom ioctls".

Signed-off-by: Dan Carpenter <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 drivers/media/video/uvc/uvc_v4l2.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

---

http://git.linuxtv.org/media_tree.git?a=commitdiff;h=72da1f20afae1bd3f7ee4a27b2b8cda8838d61ef

diff --git a/drivers/media/video/uvc/uvc_v4l2.c 
b/drivers/media/video/uvc/uvc_v4l2.c
index ff2cddd..111bfff 100644
--- a/drivers/media/video/uvc/uvc_v4l2.c
+++ b/drivers/media/video/uvc/uvc_v4l2.c
@@ -1105,8 +1105,6 @@ static int uvc_v4l2_put_xu_mapping(const struct 
uvc_xu_control_mapping *kp,
        if (get_user(p, &up->menu_info))
                return -EFAULT;
        umenus = compat_ptr(p);
-       if (!access_ok(VERIFY_WRITE, umenus, kp->menu_count * sizeof(*umenus)))
-               return -EFAULT;
 
        if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus)))
                return -EFAULT;

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