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    Subject[PATCH] Fix netpoll cleanup on abort without dev
    If netpoll attempts to use a device without polling support, it will
    oops when shutting down. This adds a check that we've actually
    attached to a device.

    Signed-off-by: Matt Mackall <mpm@selenic.com>

    Index: np/net/core/netpoll.c
    ===================================================================
    --- np.orig/net/core/netpoll.c 2004-08-04 08:50:56.000000000 -0500
    +++ np/net/core/netpoll.c 2004-08-04 09:02:50.000000000 -0500
    @@ -614,7 +614,8 @@
    spin_lock_irqsave(&rx_list_lock, flags);
    list_del(&np->rx_list);
    #ifdef CONFIG_NETPOLL_RX
    - np->dev->netpoll_rx = 0;
    + if (np->dev)
    + np->dev->netpoll_rx = 0;
    #endif
    spin_unlock_irqrestore(&rx_list_lock, flags);
    }

    --
    Mathematics is the supreme nostalgia of our time.
    -
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