drm/i915: Record the error batchbuffer on each ring

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9c4cdc1..a7c194a 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -750,7 +750,9 @@
 		if (error->batchbuffer[i]) {
 			struct drm_i915_error_object *obj = error->batchbuffer[i];
 
-			seq_printf(m, "--- gtt_offset = 0x%08x\n", obj->gtt_offset);
+			seq_printf(m, "%s --- gtt_offset = 0x%08x\n",
+				   dev_priv->ring[i].name,
+				   obj->gtt_offset);
 			offset = 0;
 			for (page = 0; page < obj->page_count; page++) {
 				for (elt = 0; elt < PAGE_SIZE/4; elt++) {