They might call commit with ACTION_NOTHING without a mode.
We shouldn't crash but simply skip updating stream scaling
settings since scaling obviously didn't change without a
provided mode.

Change-Id: Id787a2f3dd73eef3512cb35f48c8cd5842d22032
Signed-off-by: Harry Wentland <[email protected]>
Reviewed-by: Andrey Grodzovsky <[email protected]>
Acked-by: Harry Wentland <[email protected]>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
index 865ee1ecce4f..c8a7b636a1b3 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
@@ -644,6 +644,10 @@ static void update_stream_scaling_settings(
        struct rect src = { 0 }; /* viewport in composition space*/
        struct rect dst = { 0 }; /* stream addressable area */
 
+       /* no mode. nothing to be done */
+       if (!mode)
+               return;
+
        /* Full screen scaling by default */
        src.width = mode->hdisplay;
        src.height = mode->vdisplay;
-- 
2.9.3

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