From: Wenjing Liu <wenjing.liu@xxxxxxx>
[why&how]
In some platform out_transfer_func may not be popualted. We need to check
for null before dereferencing it.
Fixes: 4b939f625e9b ("drm/amd/display: Generalize new minimal transition path")
Reviewed-by: Alvin Lee <alvin.lee2@xxxxxxx>
Acked-by: Tom Chung <chiahsuan.chung@xxxxxxx>
Signed-off-by: Wenjing Liu <wenjing.liu@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index dd9fe36646a3..726c82be16fa 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -3057,7 +3057,8 @@ static void backup_planes_and_stream_state(
scratch->blend_tf[i] = *status->plane_states[i]->blend_tf;
}
scratch->stream_state = *stream;
- scratch->out_transfer_func = *stream->out_transfer_func;
+ if (stream->out_transfer_func)
+ scratch->out_transfer_func = *stream->out_transfer_func;
}
static void restore_planes_and_stream_state(
@@ -3079,7 +3080,8 @@ static void restore_planes_and_stream_state(
*status->plane_states[i]->blend_tf = scratch->blend_tf[i];
}
*stream = scratch->stream_state;
- *stream->out_transfer_func = scratch->out_transfer_func;
+ if (stream->out_transfer_func)
+ *stream->out_transfer_func = scratch->out_transfer_func;
}
/**
--
2.34.1
