Commit 9d6bd606 authored Jan 20, 2026 by Wenjing Liu Committed by Alex Deucher Feb 03, 2026

drm/amd/display: Fix a NULL pointer dereference in dcn20_hwseq.c



[why]
hws->funcs.dccg_init is accessed without checking if it is NULL, which
may lead to a NULL pointer dereference.

[how]
Add a NULL check before calling dccg_init.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent e121ccca

drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -3140,6 +3140,7 @@ void dcn20_fpga_init_hw(struct dc *dc)

		dcn10_hubbub_global_timer_enable(dc->res_pool->hubbub, true, 2);

		if (hws->funcs.dccg_init)
		hws->funcs.dccg_init(hws);

		if (dc->res_pool->dccg && dc->res_pool->dccg->funcs && dc->res_pool->dccg->funcs->refclk_setup)