From: Shirish S Date: Thu, 26 Oct 2017 11:47:42 +0530 Subject: drm/amd/display: fix null pointer dereference Git-commit: 55d9038b0c680ec90e3a7d2440e717ac6a2a8064 Patch-mainline: v4.15-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 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 Reviewed-by: Harry Wentland Reviewed-by: Tony Cheng Signed-off-by: Alex Deucher Acked-by: Petr Tesarik --- drivers/gpu/drm/amd/display/dc/core/dc_stream.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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, ¶m); if (mi != NULL && mi->funcs->set_cursor_position != NULL)