From 5f3f302a6f4cb74906c05fad1d03fc5e95c7e5af Mon Sep 17 00:00:00 2001
From: Arne Jansen <sensille@gmx.net>
Date: Mon, 30 May 2011 08:36:16 +0000
Subject: [PATCH] btrfs: false BUG_ON when degraded

In degraded mode the struct btrfs_device of missing devs don't have
device->name set. A kstrdup of NULL correctly returns NULL. Don't
BUG in this case.

Signed-off-by: Arne Jansen <sensille@gmx.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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