From: Nikolay Borisov <nborisov@suse.com>
Date: Tue, 14 May 2019 10:54:40 +0000 (+0300)
Subject: btrfs: dev-replace: Remove impossible WARN_ON
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=419684b2c217d2eba6a4a4cf0548c346be7879d7;p=openwrt%2Fstaging%2Fblogic.git

btrfs: dev-replace: Remove impossible WARN_ON

This WARN_ON can never trigger because src_device cannot be null.
btrfs_find_device_by_devspec always returns either an error or a valid
pointer to the device. Just remove it.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 2fa826b12d40..eb8b5cb2c40d 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -447,7 +447,6 @@ static int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
 	}
 
 	dev_replace->cont_reading_from_srcdev_mode = read_src;
-	WARN_ON(!src_device);
 	dev_replace->srcdev = src_device;
 	dev_replace->tgtdev = tgt_device;