1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index abd218d429fe..e22735402649 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -4083,10 +4083,12 @@ static void qib_update_7322_usrhead(struct qib_ctxtdata *rcd, u64 hd,
          */
         if (hd >> IBA7322_HDRHEAD_PKTINT_SHIFT)
                 adjust_rcv_timeout(rcd, npkts);
-        qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
-        qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
         if (updegr)
                 qib_write_ureg(rcd->dd, ur_rcvegrindexhead, egrhd, rcd->ctxt);
+        mmiowb();
+        qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
+        qib_write_ureg(rcd->dd, ur_rcvhdrhead, hd, rcd->ctxt);
+        mmiowb();
 }
 
 static u32 qib_7322_hdrqempty(struct qib_ctxtdata *rcd)