From: Kent Overstreet <kent.overstreet@gmail.com>
Date: Tue, 18 Dec 2018 13:41:58 +0000 (-0500)
Subject: bcachefs: fix device remove error path
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d3bb629d04ec4ec49556fe3d974e0744a0dd0084;p=linux.git

bcachefs: fix device remove error path

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---

diff --git a/fs/bcachefs/super.c b/fs/bcachefs/super.c
index b2113c5426ca3..4e811ffdec8e1 100644
--- a/fs/bcachefs/super.c
+++ b/fs/bcachefs/super.c
@@ -1306,7 +1306,8 @@ int bch2_dev_remove(struct bch_fs *c, struct bch_dev *ca, int flags)
 	mutex_unlock(&c->state_lock);
 	return 0;
 err:
-	if (ca->mi.state == BCH_MEMBER_STATE_RW)
+	if (ca->mi.state == BCH_MEMBER_STATE_RW &&
+	    !percpu_ref_is_zero(&ca->io_ref))
 		__bch2_dev_read_write(c, ca);
 	mutex_unlock(&c->state_lock);
 	return ret;