From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Thu, 10 Mar 2022 22:35:06 +0000 (-0500)
Subject: bcachefs: Add a missing wakeup
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cc23255e9a9fcaf7423e0fe7e197605bf10a3f06;p=linux.git

bcachefs: Add a missing wakeup

This fixes a rare bug with bch2_btree_flush_all_writes() getting stuck.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
---

diff --git a/fs/bcachefs/btree_io.c b/fs/bcachefs/btree_io.c
index 3031b566a112b..887a1b145cdc8 100644
--- a/fs/bcachefs/btree_io.c
+++ b/fs/bcachefs/btree_io.c
@@ -1622,6 +1622,8 @@ static void __btree_node_write_done(struct bch_fs *c, struct btree *b)
 
 	if (new & (1U << BTREE_NODE_write_in_flight))
 		__bch2_btree_node_write(c, b, BTREE_WRITE_ALREADY_STARTED);
+	else
+		wake_up_bit(&b->flags, BTREE_NODE_write_in_flight);
 }
 
 static void btree_node_write_done(struct bch_fs *c, struct btree *b)
@@ -2091,7 +2093,6 @@ restart:
 			rcu_read_unlock();
 			wait_on_bit_io(&b->flags, flag, TASK_UNINTERRUPTIBLE);
 			goto restart;
-
 		}
 	rcu_read_unlock();
 }