From: Charlene Liu <charlene.liu@amd.com>
Date: Sat, 20 May 2023 00:43:30 +0000 (-0400)
Subject: drm/amd/display: add NULL pointer check
X-Git-Tag: v6.5-rc1~153^2~7^2~4
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=389c6b3e120303715c018d1bfc7bab02b50ca3f4;p=thirdparty%2Fkernel%2Fstable.git

drm/amd/display: add NULL pointer check

[why]
check dmub_Srv exist or not before accessing dmub.

Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Zhan Liu <Zhan.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index 0d3ec50b13851..6e11d2b701f82 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -276,8 +276,8 @@ static void program_cursor_attributes(
 		}
 
 		dc->hwss.set_cursor_attribute(pipe_ctx);
-
-		dc_send_update_cursor_info_to_dmu(pipe_ctx, i);
+		if (dc->ctx->dmub_srv)
+			dc_send_update_cursor_info_to_dmu(pipe_ctx, i);
 		if (dc->hwss.set_cursor_sdr_white_level)
 			dc->hwss.set_cursor_sdr_white_level(pipe_ctx);
 	}
@@ -396,8 +396,8 @@ static void program_cursor_position(
 		}
 
 		dc->hwss.set_cursor_position(pipe_ctx);
-
-		dc_send_update_cursor_info_to_dmu(pipe_ctx, i);
+		if (dc->ctx->dmub_srv)
+			dc_send_update_cursor_info_to_dmu(pipe_ctx, i);
 	}
 
 	if (pipe_to_program)