drm/nouveau/fifo/gk104: don't attempt recovery of unknown mmu engines

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c
index a46971a..4529adc 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c
@@ -399,7 +399,7 @@ gk104_fifo_intr_fault(struct gk104_fifo *fifo, int unit)
                snprintf(gpcid, sizeof(gpcid), "GPC%d/", gpc);
        }
 
-       if (eu) {
+       if (eu && eu->data2) {
                switch (eu->data2) {
                case NVKM_SUBDEV_BAR:
                        nvkm_mask(device, 0x001704, 0x00000000, 0x00000000);