RDMA/bnxt_re: Remove unnecessary sched count

Since the lifetime of bnxt_re_task is controlled by the kref of device,
sched_count is no longer required.  Remove it.

Link: https://lore.kernel.org/r/1584117207-2664-4-git-send-email-selvin.xavier@broadcom.comSigned-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/bnxt_re/bnxt_re.h

@@ -176,7 +176,6 @@ struct bnxt_re_dev {
 	atomic_t			srq_count;
 	atomic_t			mr_count;
 	atomic_t			mw_count;
-	atomic_t			sched_count;
 	/* Max of 2 lossless traffic class supported per port */
 	u16				cosq[2];
 

drivers/infiniband/hw/bnxt_re/main.c

@@ -1667,8 +1667,6 @@ static void bnxt_re_task(struct work_struct *work)
 		break;
 	}
 	ib_device_put(&rdev->ibdev);
-	smp_mb__before_atomic();
-	atomic_dec(&rdev->sched_count);
 exit:
 	put_device(&rdev->ibdev.dev);
 	kfree(re_work);
@@ -1720,11 +1718,6 @@ static int bnxt_re_netdev_event(struct notifier_block *notifier,
 		break;
 
 	case NETDEV_UNREGISTER:
-		/* netdev notifier will call NETDEV_UNREGISTER again later since
-		 * we are still holding the reference to the netdev
-		 */
-		if (atomic_read(&rdev->sched_count) > 0)
-			goto exit;
 		ib_unregister_device_queued(&rdev->ibdev);
 		break;
 
@@ -1742,7 +1735,6 @@ static int bnxt_re_netdev_event(struct notifier_block *notifier,
 			re_work->vlan_dev = (real_dev == netdev ?
 					     NULL : netdev);
 			INIT_WORK(&re_work->work, bnxt_re_task);
-			atomic_inc(&rdev->sched_count);
 			queue_work(bnxt_re_wq, &re_work->work);
 		}
 	}