Re: [PATCH RESEND v4 net-next 05/14] net: enetc: use PCI device name for debugfs directory

[Joe Damato]

On Mon, Jul 20, 2026 at 09:43:07AM +0800, wei.fang@xxxxxxxxxxx wrote:
> From: Wei Fang <wei.fang@xxxxxxx>
> 
> enetc_create_debugfs() is called right after register_netdev(), at which
> point ndev->name still holds the format "eth%d" (e.g., eth0) rather than
> the final assigned name (e.g., via udev rules).
> 
> Use pci_name() instead of netdev_name() to name the debugfs directory.
> The PCI device name is unique, stable, and available from the start,
> making it a more reliable identifier for the debugfs entry. Therefore,
> the observable debugfs path from something like
> /sys/kernel/debug/eth0/mac_filter to a PCI BDF-style path such as
> /sys/kernel/debug/0002:00:00.0/mac_filter.
> 
> Signed-off-by: Wei Fang <wei.fang@xxxxxxx>
> ---
>  drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c b/drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c
> index 4a769d9e5679..be378bf8f74d 100644
> --- a/drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c
> +++ b/drivers/net/ethernet/freescale/enetc/enetc4_debugfs.c
> @@ -81,10 +81,9 @@ DEFINE_SHOW_ATTRIBUTE(enetc_mac_filter);
>  
>  void enetc_create_debugfs(struct enetc_si *si)
>  {
> -	struct net_device *ndev = si->ndev;
>  	struct dentry *root;
>  
> -	root = debugfs_create_dir(netdev_name(ndev), NULL);
> +	root = debugfs_create_dir(pci_name(si->pdev), NULL);
>  	if (IS_ERR(root))
>  		return;
>  

Reviewed-by: Joe Damato <joe@xxxxxxx>