From: Julian Parkin <jparkin@amd.com>
Date: Fri, 13 Apr 2018 17:23:02 +0000 (-0400)
Subject: drm/amd/display: Add assert that chroma pitch is non zero
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8ec06a179613f7b7379daf78844afe1cc301e2c7;p=linux.git

drm/amd/display: Add assert that chroma pitch is non zero

Signed-off-by: Julian Parkin <jparkin@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
index 159bebcfd5217..0cbc83edd37ff 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
@@ -146,6 +146,9 @@ void hubp1_program_size_and_rotation(
 	 * 444 or 420 luma
 	 */
 	if (format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN) {
+		ASSERT(plane_size->video.chroma_pitch != 0);
+		/* Chroma pitch zero can cause system hang! */
+
 		pitch = plane_size->video.luma_pitch - 1;
 		meta_pitch = dcc->video.meta_pitch_l - 1;
 		pitch_c = plane_size->video.chroma_pitch - 1;