summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/ehca/ehca_irq.c
diff options
context:
space:
mode:
authorStefan Roscher <ossrosch@linux.vnet.ibm.com>2008-05-07 11:35:06 -0700
committerRoland Dreier <rolandd@cisco.com>2008-05-07 11:35:06 -0700
commit12137c593d127c6c1a3eb050674da047682badaf (patch)
treef615c55e363b550c7489aa0aceeb8d62c201fcad /drivers/infiniband/hw/ehca/ehca_irq.c
parentab69b3cf1219e0d07bb4ea373f36b1de38af531c (diff)
downloadlinux-12137c593d127c6c1a3eb050674da047682badaf.tar.gz
linux-12137c593d127c6c1a3eb050674da047682badaf.tar.bz2
linux-12137c593d127c6c1a3eb050674da047682badaf.zip
IB/ehca: Wait for async events to finish before destroying QP
This is necessary because, in a multicore environment, a race between uverbs async handler and destroy QP could occur. Signed-off-by: Stefan Roscher <stefan.roscher at de.ibm.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ehca/ehca_irq.c')
-rw-r--r--drivers/infiniband/hw/ehca/ehca_irq.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c
index ca5eb0cb628c..ce1ab0571be3 100644
--- a/drivers/infiniband/hw/ehca/ehca_irq.c
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -204,6 +204,8 @@ static void qp_event_callback(struct ehca_shca *shca, u64 eqe,
read_lock(&ehca_qp_idr_lock);
qp = idr_find(&ehca_qp_idr, token);
+ if (qp)
+ atomic_inc(&qp->nr_events);
read_unlock(&ehca_qp_idr_lock);
if (!qp)
@@ -223,6 +225,8 @@ static void qp_event_callback(struct ehca_shca *shca, u64 eqe,
if (fatal && qp->ext_type == EQPT_SRQBASE)
dispatch_qp_event(shca, qp, IB_EVENT_QP_LAST_WQE_REACHED);
+ if (atomic_dec_and_test(&qp->nr_events))
+ wake_up(&qp->wait_completion);
return;
}