linux-kernel - RE: [PATCH] drivers/net/defxx.c: use %pMF to show MAC address

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Date:	Thu, 7 Jan 2010 21:11:34 -0500
From:	"H Hartley Sweeten" <hartleys@...ionengravers.com>
To:	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	"Joe Perches" <joe@...ches.com>
Cc:	"Linux Kernel" <linux-kernel@...r.kernel.org>,
	<netdev@...r.kernel.org>, <davem@...emloft.net>
Subject: RE: [PATCH] drivers/net/defxx.c: use %pMF to show MAC address

On Thursday, January 07, 2010 7:06 PM, Maciej W. Rozycki wrote:
> On Thu, 7 Jan 2010, Joe Perches wrote:
>
>> On Thu, 2010-01-07 at 16:24 -0700, H Hartley Sweeten wrote:
>>> Use the %pMF kernel extension to display the MAC address.
>>> The address will still be displayed in the FDDI Canonical format.
>> 
>>> diff --git a/drivers/net/defxx.c b/drivers/net/defxx.c
>>> index 6a6ea03..e4eac4b 100644
>>> --- a/drivers/net/defxx.c
>>> +++ b/drivers/net/defxx.c
>>> @@ -1052,12 +1052,9 @@ static int __devinit dfx_driver_init(struct net_device *dev,
>>>  		board_name = "DEFEA";
>>>  	if (dfx_bus_pci)
>>>  		board_name = "DEFPA";
>>> -	pr_info("%s: %s at %saddr = 0x%llx, IRQ = %d, "
>>> -		"Hardware addr = %02X-%02X-%02X-%02X-%02X-%02X\n",
>>> +	pr_info("%s: %s at %saddr = 0x%llx, IRQ = %d, Hardware addr = %pMF\n",
>>>  		print_name, board_name, dfx_use_mmio ? "" : "I/O ",
>> 
>> I believe the output will _now_ be in the canonical form.
>> Before it wasn't bit reversed.  Now it should be.
>
> Output was correct -- why would you assume otherwise?  The bit order in 
> the MLA (My Long Address) register as retrieved from the MAC chip by 
> board's firmware has nothing to do with the wire order and is already in 
> the canonical form (the same applies to CAM entries and frame headers) -- 
> the board designers were sane people.
>
> With the two patches in place the output produced is now broken. :(
>

Ugh.. This is a mess...

David,

Can you please un-apply both this patch and the one for skfddi.c?
I think they should both use some form of the %p[mMF] format to display
the address but it appears Maciej is the only person that really knows
what the output _should" be...

Oh well... So much for trying to make things consistent...

Regards,
Hartley
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