Commit:     2b7274c39228d7a8c81a411dc3969763e9069c56
Parent:     3971c9f6dbf26f077b929dbe14ced60a697ebcf0
Author:     Joachim Fenkes <[EMAIL PROTECTED]>
AuthorDate: Thu Jan 24 17:59:08 2008 +0100
Committer:  Roland Dreier <[EMAIL PROTECTED]>
CommitDate: Mon Feb 4 20:20:42 2008 -0800

    IB/ehca: Prevent sending UD packets to QP0
    The IB spec doesn't allow packets to QP0 sent on any other VL than VL15.
    Hardware doesn't filter those packets on the send side, so we need to do
    this in the driver and firmware.
    As eHCA doesn't support QP0, we can just filter out all traffic going to
    QP0, regardless of SL or VL.
    Signed-off-by: Joachim Fenkes <[EMAIL PROTECTED]>
    Signed-off-by: Roland Dreier <[EMAIL PROTECTED]>
 drivers/infiniband/hw/ehca/ehca_reqs.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c 
index 3aacc8c..2ce8cff 100644
--- a/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ b/drivers/infiniband/hw/ehca/ehca_reqs.c
@@ -209,6 +209,10 @@ static inline int ehca_write_swqe(struct ehca_qp *qp,
                        ehca_gen_err("wr.ud.ah is NULL. qp=%p", qp);
                        return -EINVAL;
+               if (unlikely(send_wr->wr.ud.remote_qpn == 0)) {
+                       ehca_gen_err("dest QP# is 0. qp=%x", qp->real_qp_num);
+                       return -EINVAL;
+               }
                my_av = container_of(send_wr->wr.ud.ah, struct ehca_av, ib_ah);
                wqe_p->u.ud_av.ud_av = my_av->av;
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