d1a0f34c91
commit 90a3d22ff02b196d5884e111f39271a1d4ee8e3e upstream.
Smatch detected a divide by zero bug in check_overlay_scaling().
drivers/gpu/drm/i915/display/intel_overlay.c:976 check_overlay_scaling()
error: potential divide by zero bug '/ rec->dst_height'.
drivers/gpu/drm/i915/display/intel_overlay.c:980 check_overlay_scaling()
error: potential divide by zero bug '/ rec->dst_width'.
Prevent this by ensuring that the dst height and width are non-zero.
Fixes: 02e792fbaadb ("drm/i915: implement drmmode overlay support v4")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220124122409.GA31673@kili
(cherry picked from commit cf5b64f7f10b28bebb9b7c9d25e7aee5cbe43918)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>