[PATCH 3.16 111/245] IB/mlx4: Follow mirror sequence of device add during device removal

[Ben Hutchings]

3.16.83-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Parav Pandit <parav@xxxxxxxxxxxx>

commit 89f988d93c62384758b19323c886db917a80c371 upstream.

Current code device add sequence is:

ib_register_device()
ib_mad_init()
init_sriov_init()
register_netdev_notifier()

Therefore, the remove sequence should be,

unregister_netdev_notifier()
close_sriov()
mad_cleanup()
ib_unregister_device()

However it is not above.
Hence, make do above remove sequence.

Fixes: fa417f7b520ee ("IB/mlx4: Add support for IBoE")
Signed-off-by: Parav Pandit <parav@xxxxxxxxxxxx>
Reviewed-by: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20191212091214.315005-3-leon@xxxxxxxxxx
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
[bwh: Backported to 3.16: No need to call mlx4_ib_diag_cleanup()]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -2372,15 +2372,16 @@ static void mlx4_ib_remove(struct mlx4_d
 	ibdev->ib_active = false;
 	flush_workqueue(wq);
 
-	mlx4_ib_close_sriov(ibdev);
-	mlx4_ib_mad_cleanup(ibdev);
-	ib_unregister_device(&ibdev->ib_dev);
 	if (ibdev->iboe.nb.notifier_call) {
 		if (unregister_netdevice_notifier(&ibdev->iboe.nb))
 			pr_warn("failure unregistering notifier\n");
 		ibdev->iboe.nb.notifier_call = NULL;
 	}
 
+	mlx4_ib_close_sriov(ibdev);
+	mlx4_ib_mad_cleanup(ibdev);
+	ib_unregister_device(&ibdev->ib_dev);
+
 	mlx4_qp_release_range(dev, ibdev->steer_qpn_base,
 			      ibdev->steer_qpn_count);
 	kfree(ibdev->ib_uc_qpns_bitmap);