libxfs: fix repair deadlock due to failed inode flushes.

libxfs: fix repair deadlock due to failed inode flushes.

If inode_item_done() fails to flush an inode after we've grabbed a
reference to the underlying buffer during a transaction commit, we
fail to put the buffer and hence leak it. We then deadlock on the
next lookup ofthe inode buffer as it is still locked and no-one owns
it.

To fix it, put the buffer on error so that it gets unlocked and
can be recovered appropriately in a later phase of repair.

Reported-by: Arkadiusz Miskiewicz <arekm@maven.pl>
Fixes: d15188a1ec14 ("xfs: rework the inline directory verifiers")
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>