From 0755c38eb007196a5f779298b4a5f46c4eec41d2 Mon Sep 17 00:00:00 2001 From: Mikita Lipski Date: Mon, 15 Nov 2021 16:07:38 -0500 Subject: [PATCH] drm/amd/display: prevent reading unitialized links [why/how] The function can be called on boot or after suspend when links are not initialized, to prevent it guard it with NULL pointer check Reviewed-by: Nicholas Kazlauskas Acked-by: Pavle Kotarac Signed-off-by: Mikita Lipski Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dc_link.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index b01077a6af0e..fad3d883ed89 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -226,6 +226,8 @@ static inline void get_edp_links(const struct dc *dc, *edp_num = 0; for (i = 0; i < dc->link_count; i++) { // report any eDP links, even unconnected DDI's + if (!dc->links[i]) + continue; if (dc->links[i]->connector_signal == SIGNAL_TYPE_EDP) { edp_links[*edp_num] = dc->links[i]; if (++(*edp_num) == MAX_NUM_EDP) -- 2.25.1