[PATCH] drm/amd/display: fix null pointer dereference

[Shirish.S@xxxxxxx (S, Shirish)]

From: Shirish S <shirish.s@xxxxxxx>

While setting cursor position in case of mpo, input_pixel_processor is not available for underlay, hence add check of the same to avoid null pointer access issue.

Signed-off-by: Shirish S <shirish.s at amd.com>
Reviewed-by: Harry Wentland <harry.wentland at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_stream.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index 5cf69af..572b885 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -288,7 +288,7 @@ bool dc_stream_set_cursor_position(
 			pos_cpy.enable = false;
 
 
-		if (ipp->funcs->ipp_cursor_set_position != NULL)
+		if (ipp !=NULL && ipp->funcs->ipp_cursor_set_position != NULL)
 			ipp->funcs->ipp_cursor_set_position(ipp, &pos_cpy, &param);
 
 		if (mi != NULL && mi->funcs->set_cursor_position != NULL)
--
2.7.4