netdev - Re: [PATCH] ixgbe: Look up MAC address in Open Firmware

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Message-ID: <54666106.9000609@cogentembedded.com>
Date:	Fri, 14 Nov 2014 23:07:34 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>,
	netdev@...r.kernel.org
CC:	linux.nics@...el.com
Subject: Re: [PATCH] ixgbe: Look up MAC address in Open Firmware

Hello.

On 11/14/2014 10:16 PM, Martin K. Petersen wrote:

> Attempt to look up the MAC address in Open Firmware on systems that
> support it. If the "local-mac-address" property is not valid resort to
> using the IDPROM value.

> Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>

> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> index d2df4e3d1032..365924124fab 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
[...]
> @@ -7959,6 +7964,31 @@ int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
>   	return is_wol_supported;
>   }
>
> +#ifdef CONFIG_OF
> +/**
> + * ixgbe_of_mac_addr - Look up MAC address in Open Firmware
> + * @adapter: Pointer to adapter struct
> + */
> +static void ixgbe_of_mac_addr(struct ixgbe_adapter *adapter)
> +{
> +	struct device_node *dp = pci_device_to_OF_node(adapter->pdev);
> +	struct ixgbe_hw *hw = &adapter->hw;
> +	const unsigned char *addr;
> +	int len;
> +
> +	addr = of_get_property(dp, "local-mac-address", &len);
> +	if (addr && len == 6) {
> +		e_dev_info("Using OpenPROM MAC address\n");
> +		memcpy(hw->mac.perm_addr, addr, 6);
> +	}
> +
> +	if (!is_valid_ether_addr(hw->mac.perm_addr)) {
> +		e_dev_info("Using IDPROM MAC address\n");
> +		memcpy(hw->mac.perm_addr, idprom->id_ethaddr, 6);
> +	}
> +}
> +#endif
> +
>   /**
>    * ixgbe_probe - Device Initialization Routine
>    * @pdev: PCI device information struct
> @@ -8223,6 +8253,10 @@ skip_sriov:
>   		goto err_sw_init;
>   	}
>
> +#ifdef CONFIG_OF
> +	ixgbe_of_mac_addr(adapter);
> +#endif

    Eww... why not define the following above instead:

#else
static inline void ixgbe_of_mac_addr(struct ixgbe_adapter *adapter) {}
#endif

    This is closer to what Documentation/SubmittingPatches suggests.

WBR, Sergei

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