From: David Sterba <dsterba@suse.cz>
Date: Tue, 19 Nov 2013 12:36:21 +0000 (+0100)
Subject: btrfs: replace BUG in can_modify_feature
X-Git-Tag: v3.14-rc2~3^2~124
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cc37bb04201217b7acb11213e16cb5530c30da8f;p=profile%2Fcommon%2Fkernel-common.git

btrfs: replace BUG in can_modify_feature

We don't need to crash hard here, it's just reading a sysfs file. The
values considered in switch are from a fixed set, the default case
should not happen at all.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 8fdc052..b535285 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -75,7 +75,9 @@ static int can_modify_feature(struct btrfs_feature_attr *fa)
 		clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR;
 		break;
 	default:
-		BUG();
+		printk(KERN_WARNING "btrfs: sysfs: unknown feature set %d\n",
+				fa->feature_set);
+		return 0;
 	}
 
 	if (set & fa->feature_bit)