drm/nouveau/gr/gf100-: properly ack all FECS error interrupts

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

drivers/gpu/drm/nouveau/nvkm/engine/gr/gf100.c

@@ -1270,12 +1270,11 @@ gf100_gr_ctxctl_isr(struct gf100_gr *gr)
 			nvkm_error(subdev, "FECS MTHD subc %d class %04x "
 					   "mthd %04x data %08x\n",
 				   subc, class, mthd, data);
-
-			nvkm_wr32(device, 0x409c20, 0x00000001);
-			stat &= ~0x00000001;
 		} else {
 			nvkm_error(subdev, "FECS ucode error %d\n", code);
 		}
+		nvkm_wr32(device, 0x409c20, 0x00000001);
+		stat &= ~0x00000001;
 	}
 
 	if (stat & 0x00080000) {