src/patches/suse-2.6.27.25/patches.fixes/ib-ipath-fix-hang-on-module-unload

   1 From: Yannick Cote <yannick.cote@qlogic.com>
   2 Date: Tue, 30 Sep 2008 04:24:04 +0000 (-0700)
   3 Subject: IB/ipath: Fix hang on module unload
   4 Patch-mainline: 2.6.28-rc1
   5 Git-commit: e441d6342890838bfc6d64ca2f0964aca08ae2a2
   6 References: bnc#495068
   7
   8 IB/ipath: Fix hang on module unload
   9
  10 Handle the case where posting a send is requested when the link is
  11 down.  This fixes <https://bugs.openfabrics.org/show_bug.cgi?id=1117>.
  12
  13 Signed-off-by: Yannick Cote <yannick.cote@qlogic.com>
  14 Signed-off-by: Roland Dreier <rolandd@cisco.com>
  15 Acked-by: Jeff Mahoney <jeffm@suse.com>
  16 ---
  17
  18  drivers/infiniband/hw/ipath/ipath_verbs.c |    7 +++++++
  19  1 file changed, 7 insertions(+)
  20
  21 diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.c b/drivers/infiniband/hw/ipath/ipath_verbs.c
  22 index b766e40..eabc424 100644
  23 --- a/drivers/infiniband/hw/ipath/ipath_verbs.c
  24 +++ b/drivers/infiniband/hw/ipath/ipath_verbs.c
  25 @@ -340,9 +340,16 @@ static int ipath_post_one_send(struct ipath_qp *qp, struct ib_send_wr *wr)
  26         int acc;
  27         int ret;
  28         unsigned long flags;
  29 +       struct ipath_devdata *dd = to_idev(qp->ibqp.device)->dd;
  30
  31         spin_lock_irqsave(&qp->s_lock, flags);
  32
  33 +       if (qp->ibqp.qp_type != IB_QPT_SMI &&
  34 +           !(dd->ipath_flags & IPATH_LINKACTIVE)) {
  35 +               ret = -ENETDOWN;
  36 +               goto bail;
  37 +       }
  38 +
  39         /* Check that state is OK to post send. */
  40         if (unlikely(!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)))
  41                 goto bail_inval;