From: Aric Cyr <[email protected]>

[Why]
Engine can be NULL in some cases, so we must not acquire it.

[How]
Check for NULL engine before acquiring.

Signed-off-by: Aric Cyr <[email protected]>
Reviewed-by: Harry Wentland <[email protected]>
Acked-by: Bhawanpreet Lakha <[email protected]>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_aux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c 
b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
index f1a5d2c6aa37..68c4049cbc2a 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_aux.c
@@ -400,7 +400,7 @@ static bool acquire(
 {
        enum gpio_result result;
 
-       if (!is_engine_available(engine))
+       if ((engine == NULL) || !is_engine_available(engine))
                return false;
 
        result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE,
-- 
2.17.1

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