IB/iser: Protect completion context active_qps update

As iser connections can share completion contexts, we need
to protect the active_qps update each time we set it.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 6a9d1cb548ee..30b622f2ab73 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -597,7 +597,9 @@ static void iser_free_ib_conn_res(struct iser_conn *iser_conn,
                   iser_conn, ib_conn->cma_id, ib_conn->qp);
 
         if (ib_conn->qp != NULL) {
+                mutex_lock(&ig.connlist_mutex);
                 ib_conn->comp->active_qps--;
+                mutex_unlock(&ig.connlist_mutex);
                 rdma_destroy_qp(ib_conn->cma_id);
                 ib_conn->qp = NULL;
         }