tree 2ccca24d811228b3cce05268d0f48f70548decc5
parent 19e0b4cab9cf3c07bc84360a854f9040d8c64644
author Rodrigo Vivi <rodrigo.vivi@intel.com> 1470237777 -0700
committer Rodrigo Vivi <rodrigo.vivi@intel.com> 1470415187 -0700

drm/i915: Fix copy_to_user usage for pipe_crc

Copy to user return the number of bytes it couldn't write
and zero on success. So any number different than 0 should
be considered a fault, not only when it doesn't write
the full size.

v2: fixed the inverted logic. (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>