IB/ipath: Set M bit in BTH according to IB spec

According to chapter 17.2.8.1.1, QPs start in the migrated state and
should send packets with the M bit set in the BTH.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/ipath/ipath_rc.c b/drivers/infiniband/hw/ipath/ipath_rc.c
index 1915771..9ba80d1 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_rc.c
+++ b/drivers/infiniband/hw/ipath/ipath_rc.c
@@ -188,7 +188,7 @@ static int ipath_make_rc_ack(struct ipath_qp *qp,
        }
        qp->s_hdrwords = hwords;
        qp->s_cur_size = len;
-       *bth0p = bth0;
+       *bth0p = bth0 | (1 << 22); /* Set M bit */
        *bth2p = bth2;
        return 1;
 
@@ -240,7 +240,7 @@ int ipath_make_rc_req(struct ipath_qp *qp,
 
        /* header size in 32-bit words LRH+BTH = (8+12)/4. */
        hwords = 5;
-       bth0 = 0;
+       bth0 = 1 << 22; /* Set M bit */
 
        /* Send a request. */
        wqe = get_swqe_ptr(qp, qp->s_cur);
@@ -604,7 +604,7 @@ static void send_rc_ack(struct ipath_qp *qp)
        }
        /* read pkey_index w/o lock (its atomic) */
        bth0 = ipath_get_pkey(dev->dd, qp->s_pkey_index) |
-               OP(ACKNOWLEDGE) << 24;
+               (OP(ACKNOWLEDGE) << 24) | (1 << 22);
        if (qp->r_nak_state)
                ohdr->u.aeth = cpu_to_be32((qp->r_msn & IPATH_MSN_MASK) |
                                            (qp->r_nak_state <<

diff --git a/drivers/infiniband/hw/ipath/ipath_uc.c b/drivers/infiniband/hw/ipath/ipath_uc.c
index 49d650c..243d7c6 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_uc.c
+++ b/drivers/infiniband/hw/ipath/ipath_uc.c
@@ -86,7 +86,7 @@ int ipath_make_uc_req(struct ipath_qp *qp,
 
        /* header size in 32-bit words LRH+BTH = (8+12)/4. */
        hwords = 5;
-       bth0 = 0;
+       bth0 = 1 << 22; /* Set M bit */
 
        /* Get the next send request. */
        wqe = get_swqe_ptr(qp, qp->s_last);