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drm/amd/display: Add a dc_state NULL check in dc_state_release

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[How]
Check wheather state is NULL before releasing it.

Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Allen Pan <allen.pan@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Allen Pan 2024-02-23 18:20:16 -05:00 committed by Alex Deucher
parent e64b3f55e4
commit 334b56cea5
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/core/dc_state.c
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@ -334,7 +334,8 @@ static void dc_state_free(struct kref *kref)
void dc_state_release(struct dc_state *state)
{
kref_put(&state->refcount, dc_state_free);
if (state != NULL)
kref_put(&state->refcount, dc_state_free);
}
/*
* dc_state_add_stream() - Add a new dc_stream_state to a dc_state.