md/raid5: ignore released_stripes check

conf->released_stripes list isn't always related to where there are
free stripes pending. Active stripes can be in the list too.
And even free stripes were active very recently.

Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 9a3b143..59e44e9 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -681,8 +681,8 @@
 		if (!sh) {
 			if (!test_bit(R5_INACTIVE_BLOCKED, &conf->cache_state)) {
 				sh = get_free_stripe(conf, hash);
-				if (!sh && llist_empty(&conf->released_stripes) &&
-				    !test_bit(R5_DID_ALLOC, &conf->cache_state))
+				if (!sh && !test_bit(R5_DID_ALLOC,
+						     &conf->cache_state))
 					set_bit(R5_ALLOC_MORE,
 						&conf->cache_state);
 			}