From: Zygo Blaxell <ce3g8jdj@umail.furryterror.org>
Date: Tue, 1 Sep 2020 04:49:02 +0000 (-0400)
Subject: zygo: fixup btrfs: do not resolve backrefs for roots that are being deleted
X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ef2ed07ed2e2c9404c416089866f5b81cba1cfe;p=linux

zygo: fixup btrfs: do not resolve backrefs for roots that are being deleted

(cherry picked from commit 2e219d3245d453c3fb8d9ae990b5725bfc7daf40)
---

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index c942775aa096..ace3b91ad5c9 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -560,6 +560,7 @@ static int resolve_indirect_ref(struct btrfs_fs_info *fs_info,
 
 	if (!path->search_commit_root &&
 	    test_bit(BTRFS_ROOT_DELETING, &root->state)) {
+		srcu_read_unlock(&fs_info->subvol_srcu, index);
 		ret = -ENOENT;
 		goto out;
 	}