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

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BugLink: https://bugs.launchpad.net/bugs/2060531

[ Upstream commit 334b56cea5d9df5989be6cf1a5898114fa70ad98 ]

[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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
This commit is contained in:
Allen Pan
2024-02-23 18:20:16 -05:00
committed by Roxana Nicolescu
parent d5f65ceac9
commit 8f36ab14f4
1 changed files with 2 additions and 1 deletions
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drivers/gpu/drm/amd/display/dc/core/dc_state.c
+2 -1
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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.