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stmmac: debugfs entry name is not be changed when udev rename device name.
Add one notifier for udev changes net device name. Fixes: b6601323ef9e ("net: stmmac: debugfs entry name is not be changed when udev rename") Signed-off-by: Jiping Ma <jiping.ma2@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 32 additions and 0 deletions
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@ -106,6 +106,7 @@ MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode");
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static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
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#ifdef CONFIG_DEBUG_FS
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static const struct net_device_ops stmmac_netdev_ops;
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static void stmmac_init_fs(struct net_device *dev);
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static void stmmac_exit_fs(struct net_device *dev);
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#endif
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@ -4256,6 +4257,34 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
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}
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DEFINE_SHOW_ATTRIBUTE(stmmac_dma_cap);
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/* Use network device events to rename debugfs file entries.
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*/
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static int stmmac_device_event(struct notifier_block *unused,
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unsigned long event, void *ptr)
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{
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struct net_device *dev = netdev_notifier_info_to_dev(ptr);
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struct stmmac_priv *priv = netdev_priv(dev);
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if (dev->netdev_ops != &stmmac_netdev_ops)
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goto done;
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switch (event) {
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case NETDEV_CHANGENAME:
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if (priv->dbgfs_dir)
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priv->dbgfs_dir = debugfs_rename(stmmac_fs_dir,
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priv->dbgfs_dir,
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stmmac_fs_dir,
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dev->name);
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break;
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}
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done:
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return NOTIFY_DONE;
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}
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static struct notifier_block stmmac_notifier = {
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.notifier_call = stmmac_device_event,
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};
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static void stmmac_init_fs(struct net_device *dev)
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{
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struct stmmac_priv *priv = netdev_priv(dev);
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@ -4270,12 +4299,15 @@ static void stmmac_init_fs(struct net_device *dev)
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/* Entry to report the DMA HW features */
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debugfs_create_file("dma_cap", 0444, priv->dbgfs_dir, dev,
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&stmmac_dma_cap_fops);
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register_netdevice_notifier(&stmmac_notifier);
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}
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static void stmmac_exit_fs(struct net_device *dev)
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{
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struct stmmac_priv *priv = netdev_priv(dev);
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unregister_netdevice_notifier(&stmmac_notifier);
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debugfs_remove_recursive(priv->dbgfs_dir);
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}
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#endif /* CONFIG_DEBUG_FS */
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