tree 5ed695e48b6d32fd45e582496edc1b3da6f3b5f0
parent 3627bf4503b504077332c13496cb1bd54713bcbb
author Josef Bacik <jbacik@fusionio.com> 1343917340 -0400
committer Chris Mason <chris.mason@oracle.com> 1346187209 -0400

Btrfs: do not use missing devices when showing devname

If you do the following

mkfs.btrfs /dev/sdb /dev/sdc
rmmod btrfs
dd if=/dev/zero of=/dev/sdb bs=1M count=1
mount -o degraded /dev/sdc /mnt/btrfs-test

the box will panic trying to deref the name for the missing dev since it is
the lower numbered devid.  So fix show_devname to not use missing devices.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>