From: David Sterba <dsterba@suse.com>
Date: Fri, 29 Jun 2018 08:57:10 +0000 (+0200)
Subject: btrfs: raid56: catch errors from full_stripe_write
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c7b562c5480322ffaf591f45a4ff7ee089340ab4;p=openwrt%2Fstaging%2Fblogic.git

btrfs: raid56: catch errors from full_stripe_write

Add fall-back code to catch failure of full_stripe_write. Proper error
handling from inside run_plug would need more code restructuring as it's
called at arbitrary points by io scheduler.

Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index 272acd9b1192..df41d7049936 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1686,8 +1686,11 @@ static void run_plug(struct btrfs_plug_cb *plug)
 		list_del_init(&cur->plug_list);
 
 		if (rbio_is_full(cur)) {
+			int ret;
+
 			/* we have a full stripe, send it down */
-			full_stripe_write(cur);
+			ret = full_stripe_write(cur);
+			BUG_ON(ret);
 			continue;
 		}
 		if (last) {