1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 8c2cb87bccc5..c1f9cc728c2d 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -553,6 +553,9 @@ static int slow_eval_unknown_fn(struct subchannel_id schid, void *data)
                 default:
                         rc = 0;
                 }
+                /* Allow scheduling here since the containing loop might
+                 * take a while.  */
+                cond_resched();
         }
         return rc;
 }