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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>
This commit is contained in:
Jiping Ma 2020-01-07 14:34:00 +08:00 committed by David S. Miller
parent c101fffcd7
commit 481a7d154c
1 changed files with 32 additions and 0 deletions
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32
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@ -106,6 +106,7 @@ MODULE_PARM_DESC(chain_mode, "To use chain instead of ring mode");
static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
#ifdef CONFIG_DEBUG_FS
static const struct net_device_ops stmmac_netdev_ops;
static void stmmac_init_fs(struct net_device *dev);
static void stmmac_exit_fs(struct net_device *dev);
#endif
@ -4256,6 +4257,34 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
}
DEFINE_SHOW_ATTRIBUTE(stmmac_dma_cap);
/* Use network device events to rename debugfs file entries.
*/
static int stmmac_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct stmmac_priv *priv = netdev_priv(dev);
if (dev->netdev_ops != &stmmac_netdev_ops)
goto done;
switch (event) {
case NETDEV_CHANGENAME:
if (priv->dbgfs_dir)
priv->dbgfs_dir = debugfs_rename(stmmac_fs_dir,
priv->dbgfs_dir,
stmmac_fs_dir,
dev->name);
break;
}
done:
return NOTIFY_DONE;
}
static struct notifier_block stmmac_notifier = {
.notifier_call = stmmac_device_event,
};
static void stmmac_init_fs(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
@ -4270,12 +4299,15 @@ static void stmmac_init_fs(struct net_device *dev)
/* Entry to report the DMA HW features */
debugfs_create_file("dma_cap", 0444, priv->dbgfs_dir, dev,
&stmmac_dma_cap_fops);
register_netdevice_notifier(&stmmac_notifier);
}
static void stmmac_exit_fs(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
unregister_netdevice_notifier(&stmmac_notifier);
debugfs_remove_recursive(priv->dbgfs_dir);
}
#endif /* CONFIG_DEBUG_FS */