Drivers: Staging: cxt1e1: use __dev_get_name instead of dev_get_name to find interfaces
The following call chain denotes that both do_reset() and do_del_chan() are protected under rtnl_lock. If we use __dev_get_by_name() instead of dev_get_by_name() to find interface handlers in them, this would help us avoid to change interface reference counter. dev_ioctl() rtnl_lock() dev_ifsioc() c4_ioctl() do_reset() do_del_chan() rtnl_unlock() Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -770,9 +770,9 @@ do_del_chan (struct net_device *musycc_dev, void *data)
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if (cp.channum > 999)
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return -EINVAL;
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snprintf (buf, sizeof(buf), CHANNAME "%d", cp.channum);
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if (!(dev = dev_get_by_name (&init_net, buf)))
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return -ENOENT;
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dev_put (dev);
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dev = __dev_get_by_name(&init_net, buf);
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if (!dev)
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return -ENODEV;
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ret = do_deluser (dev, 1);
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if (ret)
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return ret;
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@ -792,7 +792,8 @@ do_reset (struct net_device *musycc_dev, void *data)
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char buf[sizeof (CHANNAME) + 3];
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sprintf (buf, CHANNAME "%d", i);
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if (!(ndev = dev_get_by_name(&init_net, buf)))
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ndev = __dev_get_by_name(&init_net, buf);
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if (!ndev)
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continue;
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priv = dev_to_hdlc (ndev)->priv;
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@ -800,11 +801,9 @@ do_reset (struct net_device *musycc_dev, void *data)
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(unsigned long) (netdev_priv(musycc_dev)))
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{
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ndev->flags &= ~IFF_UP;
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dev_put (ndev);
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netif_stop_queue (ndev);
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do_deluser (ndev, 1);
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} else
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dev_put (ndev);
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}
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}
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return 0;
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}
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