xfs: fix double IRELE in xfs_dqrele_inode
xfs_dqrele_inode calls xfs_iput to release the ilock and a reference and then also calls IRELE which does a second decrement of the reference count. This leads to a premature freeing of inodes when quotas were turned off while the filesystem was mounted. Thanks to Utako Kusaka for reporting the bug and provinding a good testcase. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reported-by: NUtako Kusaka <u-kusaka@wm.jp.nec.com> Reviewed-by: NAlex Elder <aelder@sgi.com> Signed-off-by: NAlex Elder <aelder@sgi.com>
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