drm/amd/display: Don't blow up if TG is NULL in dce110_vblank_set

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c b/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c
index 9bc1c1d90bad242884ce232cb1cd744084348030..afe0876fe6f8dd0f9f563422695398fd22e7a2be 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c
+++ b/drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c
@@ -208,7 +208,7 @@ bool dce110_vblank_set(struct irq_service *irq_service,
                        core_dc->current_state->res_ctx.pipe_ctx[pipe_offset].stream_res.tg;
 
        if (enable) {
-               if (!tg->funcs->arm_vert_intr(tg, 2)) {
+               if (!tg || !tg->funcs->arm_vert_intr(tg, 2)) {
                        DC_ERROR("Failed to get VBLANK!\n");
                        return false;
                }