Re: [PATCH] stmmac: debugfs entry name is not be changed when udev rename device name.

[Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>]

Hello!

On 31.12.2019 5:03, Jiping Ma wrote:

> 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 | 38 ++++++++++++++++++-
>   1 file changed, 37 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index b14f46a57154..c1c877bb4421 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -4038,6 +4038,40 @@ static int stmmac_dma_cap_show(struct seq_file *seq, void *v)
>   }
>   DEFINE_SHOW_ATTRIBUTE(stmmac_dma_cap);
>   
> +/**
> + * Use network device events to create/remove/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;
> +
> +	case NETDEV_GOING_DOWN:
> +		break;
> +
> +	case NETDEV_UP:
> +		break;

    Why not merge the above 2 cases? Or just remove them('event' is not *enum*)?

> +	}
> +
> +done:
> +	return NOTIFY_DONE;
> +}
[...]

MBR, Sergei