commit 26c3679101dbccc054dcf370143941844ba70531
author Miklos Szeredi <mszeredi@suse.cz> Mon Jan 26 15:00:59 2009 +0100
committer Miklos Szeredi <mszeredi@suse.de> Mon Jan 26 15:00:59 2009 +0100
tree 983066c18cacdd2d96534040d076dd66310acfe5
parent c2b8f006909b9bf9e165dfdf3c378527938c4497

fuse: destroy bdi on umount

If a fuse filesystem is unmounted but the device file descriptor
remains open and a new mount reuses the old device number, then the
mount fails with EEXIST and the following warning is printed in the
kernel log:

  WARNING: at fs/sysfs/dir.c:462 sysfs_add_one+0x35/0x3d()
  sysfs: duplicate filename '0:15' can not be created

The cause is that the bdi belonging to the fuse filesystem was
destoryed only after the device file was released.  Fix this by
calling bdi_destroy() from fuse_put_super() instead.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: stable@kernel.org