r8169: fix lockdep warning when removing interface

The work queue is initialised in rtl_open (when the interface goes up),
but canceled in rtl_remove_one (when the PCI device gets removed). If
the network interface is not brought up, then the work queue struct is
not initialised. When the device is removed, the attempt to cancel the
uninitialised work queue causes a lockdep warning.

This patch fixes the issue by moving cancel_work_sync to rtl_close (to
match rtl_open). (Note that rtl_close is also called via
unregister_netdev in rtl_remove_one.)

Signed-off-by: Peter Wu <lekensteyn@gmail.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 4106a743ca74c16e0dcf02b1d9b9bc10b76e79a9..880015cae6a3d170e67d51ba21a895688603f761 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -6468,6 +6468,8 @@ static int rtl8169_close(struct net_device *dev)
        rtl8169_down(dev);
        rtl_unlock_work(tp);
 
+       cancel_work_sync(&tp->wk.work);
+
        free_irq(pdev->irq, dev);
 
        dma_free_coherent(&pdev->dev, R8169_RX_RING_BYTES, tp->RxDescArray,
@@ -6793,8 +6795,6 @@ static void rtl_remove_one(struct pci_dev *pdev)
                rtl8168_driver_stop(tp);
        }
 
-       cancel_work_sync(&tp->wk.work);
-
        netif_napi_del(&tp->napi);
 
        unregister_netdev(dev);