From: Wenjing Liu <[email protected]> [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 <[email protected]> Signed-off-by: Wenjing Liu <[email protected]> Signed-off-by: Wayne Lin <[email protected]> --- drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c index 87a1dc27def4..307e8f8060e6 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c @@ -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); -- 2.43.0
