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drm/amd/display: Fix pointer dereferenced before checking

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The value actual_pix_clk_100Hz is dereferencing pointer pix_clk_params
before pix_clk_params is being null checked. Fix this by assigning
pix_clk_params->requested_pix_clk_100hz to actual_pix_clk_100Hz only if
pix_clk_params is not NULL, otherwise just NULL.

Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Haowen Bai
2022-03-24 17:46:02 +08:00
committed by Alex Deucher
parent 44e121fbf1
commit e84c8ab52d
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
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@@ -1254,7 +1254,7 @@ static uint32_t dcn3_get_pix_clk_dividers(
struct pixel_clk_params *pix_clk_params,
struct pll_settings *pll_settings)
{
unsigned long long actual_pix_clk_100Hz = pix_clk_params->requested_pix_clk_100hz;
unsigned long long actual_pix_clk_100Hz = pix_clk_params ? pix_clk_params->requested_pix_clk_100hz : 0;
struct dce110_clk_src *clk_src;
clk_src = TO_DCE110_CLK_SRC(cs);