blob: d047ad044593977dbe4fdaca6d0a733077563995 [file] [log] [blame]
From 4bbcaf457aaacc7140832f81767887e3452ef3d0 Mon Sep 17 00:00:00 2001
From: Jiping Ma <jiping.ma2@windriver.com>
Date: Tue, 7 Jan 2020 14:34:00 +0800
Subject: [PATCH] stmmac: debugfs entry name is not be changed when udev rename
device name.
commit 481a7d154cbbd5ca355cc01cc8969876b240eded upstream.
Add one notifier for udev changes net device name.
Signed-off-by: Jiping Ma <jiping.ma2@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index fd86f84e10e0..34e8aadb5e51 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -104,6 +104,7 @@ 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 int stmmac_init_fs(struct net_device *dev);
static void stmmac_exit_fs(struct net_device *dev);
#endif
@@ -4053,6 +4054,34 @@ 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 int stmmac_init_fs(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
@@ -4091,6 +4120,8 @@ static int stmmac_init_fs(struct net_device *dev)
return -ENOMEM;
}
+ register_netdevice_notifier(&stmmac_notifier);
+
return 0;
}
@@ -4098,6 +4129,7 @@ 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 */
--
2.7.4