xfs: remove xfs_trans_unreserve_quota_nblks completely

xfs_trans_cancel will release all the quota resources that were reserved
on behalf of the transaction, so get rid of the explicit unreserve step.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>

fs/xfs/xfs_bmap_util.c

@@ -820,12 +820,12 @@ xfs_alloc_file_space(
 		error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks,
 						      0, quota_flag);
 		if (error)
-			goto error1;
+			goto error;
 
 		error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
 				XFS_IEXT_ADD_NOSPLIT_CNT);
 		if (error)
-			goto error0;
+			goto error;
 
 		xfs_trans_ijoin(tp, ip, 0);
 
@@ -833,7 +833,7 @@ xfs_alloc_file_space(
 					allocatesize_fsb, alloc_type, 0, imapp,
 					&nimaps);
 		if (error)
-			goto error0;
+			goto error;
 
 		/*
 		 * Complete the transaction
@@ -856,10 +856,7 @@ xfs_alloc_file_space(
 
 	return error;
 
-error0:	/* unlock inode, unreserve quota blocks, cancel trans */
-	xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
-
-error1:	/* Just cancel transaction */
+error:
 	xfs_trans_cancel(tp);
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	return error;

fs/xfs/xfs_iomap.c

@@ -253,7 +253,7 @@ xfs_iomap_write_direct(
 	error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK,
 			XFS_IEXT_ADD_NOSPLIT_CNT);
 	if (error)
-		goto out_res_cancel;
+		goto out_trans_cancel;
 
 	xfs_trans_ijoin(tp, ip, 0);
 
@@ -265,7 +265,7 @@ xfs_iomap_write_direct(
 	error = xfs_bmapi_write(tp, ip, offset_fsb, count_fsb, bmapi_flags, 0,
 				imap, &nimaps);
 	if (error)
-		goto out_res_cancel;
+		goto out_trans_cancel;
 
 	/*
 	 * Complete the transaction
@@ -289,8 +289,6 @@ xfs_iomap_write_direct(
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	return error;
 
-out_res_cancel:
-	xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
 out_trans_cancel:
 	xfs_trans_cancel(tp);
 	goto out_unlock;

fs/xfs/xfs_quota.h

@@ -164,8 +164,6 @@ xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
 #define xfs_qm_unmount_quotas(mp)
 #endif /* CONFIG_XFS_QUOTA */
 
-#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
-	xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
 #define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
 	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
 				f | XFS_QMOPT_RES_REGBLKS)

fs/xfs/xfs_reflink.c

@@ -411,7 +411,7 @@ xfs_reflink_allocate_cow(
 			XFS_BMAPI_COWFORK | XFS_BMAPI_PREALLOC, 0, cmap,
 			&nimaps);
 	if (error)
-		goto out_unreserve;
+		goto out_trans_cancel;
 
 	xfs_inode_set_cowblocks_tag(ip);
 	error = xfs_trans_commit(tp);
@@ -436,9 +436,6 @@ xfs_reflink_allocate_cow(
 	trace_xfs_reflink_convert_cow(ip, cmap);
 	return xfs_reflink_convert_cow_locked(ip, offset_fsb, count_fsb);
 
-out_unreserve:
-	xfs_trans_unreserve_quota_nblks(tp, ip, (long)resblks, 0,
-			XFS_QMOPT_RES_REGBLKS);
 out_trans_cancel:
 	xfs_trans_cancel(tp);
 	return error;