diff options
| author | Parav Pandit <parav@mellanox.com> | 2019-05-02 10:48:04 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-05-03 11:10:03 -0300 |
| commit | adb4a57a7a1d0bf4bebc96266f30f04330e741de (patch) | |
| tree | 2ce512da297cec0e96fa4c4124adb0154a88212a /drivers/infiniband/core/cma.c | |
| parent | a70c07397fd80dfeeaead15751ab71449b548826 (diff) | |
RDMA/cma: Use rdma_read_gid_attr_ndev_rcu to access netdev
To access the netdevice of the GID attribute, use an existing API
rdma_read_gid_attr_ndev_rcu().
This further reduces dependency on open access to netdevice of GID
attribute.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/cma.c')
| -rw-r--r-- | drivers/infiniband/core/cma.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 088b5495e199..19f1730a4f24 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -1486,6 +1486,7 @@ static struct net_device * roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event) { const struct ib_gid_attr *sgid_attr = NULL; + struct net_device *ndev; if (ib_event->event == IB_CM_REQ_RECEIVED) sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr; @@ -1494,8 +1495,15 @@ roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event) if (!sgid_attr) return NULL; - dev_hold(sgid_attr->ndev); - return sgid_attr->ndev; + + rcu_read_lock(); + ndev = rdma_read_gid_attr_ndev_rcu(sgid_attr); + if (IS_ERR(ndev)) + ndev = NULL; + else + dev_hold(ndev); + rcu_read_unlock(); + return ndev; } static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event, |