net/smc: cancel event worker during device removal

During IB device removal, cancel the event worker before the device
structure is freed.

Fixes: a4cf044 ("smc: introduce SMC as an IB-client")
Reported-by: [email protected]
Signed-off-by: Karsten Graul <[email protected]>
Reviewed-by: Ursula Braun <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: karstengr

net/smc/smc_ib.c

@@ -582,6 +582,7 @@ static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data)
 	smc_smcr_terminate_all(smcibdev);
 	smc_ib_cleanup_per_ibdev(smcibdev);
 	ib_unregister_event_handler(&smcibdev->event_handler);
+	cancel_work_sync(&smcibdev->port_event_work);
 	kfree(smcibdev);
 }