From: Jiping Ma <jiping.ma2@xxxxxxxxxxxxx>
commit 481a7d154cbbd5ca355cc01cc8969876b240eded upstream.
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@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Gou Hao <gouhao@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 32 ++++++++++++++++++++++
1 file changed, 32 insertions(+)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -114,6 +114,7 @@ MODULE_PARM_DESC(chain_mode, "To use cha
static irqreturn_t stmmac_interrupt(int irq, void *dev_id);
#ifdef CONFIG_DEBUG_FS
+static const struct net_device_ops stmmac_netdev_ops;
static int stmmac_init_fs(struct net_device *dev);
static void stmmac_exit_fs(struct net_device *dev);
#endif
@@ -4034,6 +4035,34 @@ static const struct file_operations stmm
.release = single_release,
};
+/* 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 int stmmac_init_fs(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
@@ -4072,6 +4101,8 @@ static int stmmac_init_fs(struct net_dev
return -ENOMEM;
}
+ register_netdevice_notifier(&stmmac_notifier);
+
return 0;
}
@@ -4079,6 +4110,7 @@ static void stmmac_exit_fs(struct net_de
{
struct stmmac_priv *priv = netdev_priv(dev);
+ unregister_netdevice_notifier(&stmmac_notifier);
debugfs_remove_recursive(priv->dbgfs_dir);
}
#endif /* CONFIG_DEBUG_FS */
