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Subject[PATCH] stmmac: debugfs entry name is not be changed when udev rename device name.
Date
Add one notifier for udev changes net device name.

Signed-off-by: Jiping Ma <jiping.ma2@windriver.com>
---
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 28 +++++++++++++++++++
1 file changed, 28 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index b14f46a57154..3b05cb80eed7 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4038,6 +4038,31 @@ 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);
+
+ 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);
@@ -4076,6 +4101,8 @@ static int stmmac_init_fs(struct net_device *dev)
return -ENOMEM;
}

+ register_netdevice_notifier(&stmmac_notifier);
+
return 0;
}

@@ -4083,6 +4110,7 @@ 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 */
--
2.23.0
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