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

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[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>
This commit is contained in:
Wenjing Liu 2026-01-20 22:40:07 +00:00 committed by Alex Deucher
parent e121ccca8a
commit 9d6bd60695
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c
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@ -3140,7 +3140,8 @@ void dcn20_fpga_init_hw(struct dc *dc)
dcn10_hubbub_global_timer_enable(dc->res_pool->hubbub, true, 2);
hws->funcs.dccg_init(hws);
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)
dc->res_pool->dccg->funcs->refclk_setup(dc->res_pool->dccg);