diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 5703783..695978b 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -351,21 +351,28 @@
 	 * If the IDs do change before we take the ilock, we're covered
 	 * because the i_*dquot fields will get updated anyway.
 	 */
-	if (XFS_IS_QUOTA_ON(mp) && (mask & (XFS_AT_UID|XFS_AT_GID))) {
+	if (XFS_IS_QUOTA_ON(mp) &&
+	    (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID))) {
 		uint	qflags = 0;
 
-		if (mask & XFS_AT_UID) {
+		if ((mask & XFS_AT_UID) && XFS_IS_UQUOTA_ON(mp)) {
 			uid = vap->va_uid;
 			qflags |= XFS_QMOPT_UQUOTA;
 		} else {
 			uid = ip->i_d.di_uid;
 		}
-		if (mask & XFS_AT_GID) {
+		if ((mask & XFS_AT_GID) && XFS_IS_GQUOTA_ON(mp)) {
 			gid = vap->va_gid;
 			qflags |= XFS_QMOPT_GQUOTA;
 		}  else {
 			gid = ip->i_d.di_gid;
 		}
+		if ((mask & XFS_AT_PROJID) && XFS_IS_PQUOTA_ON(mp)) {
+			projid = vap->va_projid;
+			qflags |= XFS_QMOPT_PQUOTA;
+		}  else {
+			projid = ip->i_d.di_projid;
+		}
 		/*
 		 * We take a reference when we initialize udqp and gdqp,
 		 * so it is important that we never blindly double trip on
@@ -373,7 +380,8 @@
 		 */
 		ASSERT(udqp == NULL);
 		ASSERT(gdqp == NULL);
-		code = XFS_QM_DQVOPALLOC(mp, ip, uid,gid, qflags, &udqp, &gdqp);
+		code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, projid, qflags,
+					 &udqp, &gdqp);
 		if (code)
 			return (code);
 	}
@@ -510,10 +518,11 @@
 			goto error_return;
 		}
 		/*
-		 * Do a quota reservation only if uid or gid is actually
+		 * Do a quota reservation only if uid/projid/gid is actually
 		 * going to change.
 		 */
 		if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
+		    (XFS_IS_PQUOTA_ON(mp) && iprojid != projid) ||
 		    (XFS_IS_GQUOTA_ON(mp) && igid != gid)) {
 			ASSERT(tp);
 			code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp,
@@ -774,6 +783,7 @@
 		}
 		if (igid != gid) {
 			if (XFS_IS_GQUOTA_ON(mp)) {
+				ASSERT(!XFS_IS_PQUOTA_ON(mp));
 				ASSERT(mask & XFS_AT_GID);
 				ASSERT(gdqp);
 				olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
@@ -782,6 +792,13 @@
 			ip->i_d.di_gid = gid;
 		}
 		if (iprojid != projid) {
+			if (XFS_IS_PQUOTA_ON(mp)) {
+				ASSERT(!XFS_IS_GQUOTA_ON(mp));
+				ASSERT(mask & XFS_AT_PROJID);
+				ASSERT(gdqp);
+				olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip,
+							&ip->i_gdquot, gdqp);
+			}
 			ip->i_d.di_projid = projid;
 			/*
 			 * We may have to rev the inode as well as
@@ -1907,7 +1924,7 @@
 	 * Make sure that we have allocated dquot(s) on disk.
 	 */
 	error = XFS_QM_DQVOPALLOC(mp, dp,
-			current_fsuid(credp), current_fsgid(credp),
+			current_fsuid(credp), current_fsgid(credp), prid,
 			XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp);
 	if (error)
 		goto std_return;
@@ -2812,7 +2829,7 @@
 	 * Make sure that we have allocated dquot(s) on disk.
 	 */
 	error = XFS_QM_DQVOPALLOC(mp, dp,
-			current_fsuid(credp), current_fsgid(credp),
+			current_fsuid(credp), current_fsgid(credp), prid,
 			XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
 	if (error)
 		goto std_return;
@@ -3366,7 +3383,7 @@
 	 * Make sure that we have allocated dquot(s) on disk.
 	 */
 	error = XFS_QM_DQVOPALLOC(mp, dp,
-			current_fsuid(credp), current_fsgid(credp),
+			current_fsuid(credp), current_fsgid(credp), prid,
 			XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
 	if (error)
 		goto std_return;