Messages in this thread Patch in this message |  | | From | Jiping Ma <> | Subject | [PATCH] stmmac: debugfs entry name is not be changed when udev rename device name. | Date | Mon, 6 Jan 2020 10:33:41 +0800 |
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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 | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index b14f46a57154..8d927e455123 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 @@ -4038,6 +4039,34 @@ 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); @@ -4076,6 +4105,8 @@ static int stmmac_init_fs(struct net_device *dev) return -ENOMEM; } + register_netdevice_notifier(&stmmac_notifier); + return 0; } @@ -4083,6 +4114,7 @@ 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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