Commit 58c3b334 authored by Alex Hung's avatar Alex Hung Committed by Alex Deucher
Browse files

drm/amd/display: Validate hw_points_num before using it 



[WHAT]
hw_points_num is 0 before ogam LUT is programmed; however, function
"dwb3_program_ogam_pwl" assumes hw_points_num is always greater than 0,
i.e. substracting it by 1 as an array index.

[HOW]
Check hw_points_num is not equal to 0 before using it.

Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Hung <alex.hung@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 8a307777

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dwb_cm.c

+3 −0
Original line number Diff line number Diff line
@@ -243,6 +243,9 @@ static bool dwb3_program_ogam_lut( 
		return false;

	}



	if (params->hw_points_num == 0)

		return false;



	REG_SET(DWB_OGAM_CONTROL, 0, DWB_OGAM_MODE, 2);



	current_mode = dwb3_get_ogam_current(dwbc30);