IB/ipath: Fix hang on module unload

Handle the case where posting a send is requested when the link is
down.  This fixes <https://bugs.openfabrics.org/show_bug.cgi?id=1117>.

Signed-off-by: Yannick Cote <yannick.cote@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.c b/drivers/infiniband/hw/ipath/ipath_verbs.c
index b766e40e9ebf601624e3e33eb072e6a9f9e327b6..eabc4247860b429db0d6603bba4e16c943d0af7c 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_verbs.c
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c
@@ -340,9 +340,16 @@ static int ipath_post_one_send(struct ipath_qp *qp, struct ib_send_wr *wr)
        int acc;
        int ret;
        unsigned long flags;
+       struct ipath_devdata *dd = to_idev(qp->ibqp.device)->dd;
 
        spin_lock_irqsave(&qp->s_lock, flags);
 
+       if (qp->ibqp.qp_type != IB_QPT_SMI &&
+           !(dd->ipath_flags & IPATH_LINKACTIVE)) {
+               ret = -ENETDOWN;
+               goto bail;
+       }
+
        /* Check that state is OK to post send. */
        if (unlikely(!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)))
                goto bail_inval;