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drm/amd/display: Check dce_hwseq before dereferencing it

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commit b669507b637eb6b1aaecf347f193efccc65d756e upstream.

[WHAT]

hws was checked for null earlier in dce110_blank_stream, indicating hws
can be null, and should be checked whenever it is used.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 79db43611ff61280b6de58ce1305e0b2ecf675ad)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Hung
2025-06-03 18:30:55 -06:00
committed by Greg Kroah-Hartman
parent 593517e556
commit e881b82f5d
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
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@@ -1217,7 +1217,7 @@ void dce110_blank_stream(struct pipe_ctx *pipe_ctx)
struct dce_hwseq *hws = link->dc->hwseq;
if (link->local_sink && link->local_sink->sink_signal == SIGNAL_TYPE_EDP) {
if (!link->skip_implict_edp_power_control)
if (!link->skip_implict_edp_power_control && hws)
hws->funcs.edp_backlight_control(link, false);
link->dc->hwss.set_abm_immediate_disable(pipe_ctx);
}