Commit 70a9b201 authored by Juha-Pekka Heikkila's avatar Juha-Pekka Heikkila Committed by Mika Kahola
Browse files

drm/i915/display: Avoid divide by zero 



skl_crtc_allocate_plane_ddb allow iter.data_rate to be zero
which could cause divide by zero in skl_allocate_plane_ddb,
check against that.

Signed-off-by: default avatarJuha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: default avatarMika Kahola <mika.kahola@intel.com>
Link: https://lore.kernel.org/r/20250905104626.1274147-3-juhapekka.heikkila@gmail.com
parent 1de89eca

drivers/gpu/drm/i915/display/skl_watermark.c

+1 −1
Original line number Diff line number Diff line
@@ -1388,7 +1388,7 @@ skl_allocate_plane_ddb(struct skl_plane_ddb_iter *iter, 
{

	u16 size, extra = 0;



	if (data_rate) {

	if (data_rate && iter->data_rate) {

		extra = min_t(u16, iter->size,

			      DIV64_U64_ROUND_UP(iter->size * data_rate,

						 iter->data_rate));