xfs: remove dead error handling code in xfs_dquot_disk_alloc()

			XFS_DQUOT_CLUSTER_SIZE_FSB, XFS_BMAPI_METADATA,

			XFS_QM_DQALLOC_SPACE_RES(mp), &map, &nmaps);

	if (error)

		goto error0;

		return error;

	ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB);

	ASSERT(nmaps == 1);

	ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&

	/* now we can just get the buffer (there's nothing to read yet) */

	bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, dqp->q_blkno,

			mp->m_quotainfo->qi_dqchunklen, 0);

	if (!bp) {

		error = -ENOMEM;

		goto error1;

	}

	if (!bp)

		return -ENOMEM;

	bp->b_ops = &xfs_dquot_buf_ops;

	/*

	 * the buffer locked across the _defer_finish call.  We can now do

	 * this correctly with xfs_defer_bjoin.

	 *

	 * Above, we allocated a disk block for the dquot information and

	 * used get_buf to initialize the dquot.  If the _defer_bjoin fails,

	 * the buffer is still locked to *tpp, so we must _bhold_release and

	 * then _trans_brelse the buffer.  If the _defer_finish fails, the old

	 * Above, we allocated a disk block for the dquot information and used

	 * get_buf to initialize the dquot. If the _defer_finish fails, the old

	 * transaction is gone but the new buffer is not joined or held to any

	 * transaction, so we must _buf_relse it.

	 *

	 * manually or by committing the transaction.

	 */

	xfs_trans_bhold(tp, bp);

	if (error) {

		xfs_trans_bhold_release(tp, bp);

		xfs_trans_brelse(tp, bp);

		goto error1;

	}

	error = xfs_defer_finish(tpp);

	tp = *tpp;

	if (error) {

		xfs_buf_relse(bp);

		goto error0;

		return error;

	}

	*bpp = bp;

	return 0;

error1:

	xfs_defer_cancel(tp);

error0:

	return error;

}

/*