netdev - Re: [PATCH] r8169: read MAC address from EEPROM on init

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Message-ID: <48DB5C04.9050308@redhat.com>
Date:	Thu, 25 Sep 2008 11:38:12 +0200
From:	Ivan Vecera <ivecera@...hat.com>
To:	Francois Romieu <romieu@...zoreil.com>
CC:	Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>,
	Netdev <netdev@...r.kernel.org>,
	Edward Hsu <edward_hsu@...ltek.com.tw>
Subject: Re: [PATCH] r8169: read MAC address from EEPROM on init

Francois Romieu wrote:
> Ivan Vecera <ivecera@...hat.com> :
> [...]
>> OK :-), I hope the patch below is finally the right one.
> 
> My approval ratings won't surge today.
> 
> Is there a specific explanation for the 10 us delay ?
> 
> Realtek's 8168 / 8169 / 8101 drivers all use a (wildly copy'pasted ?)
> 10 ms delay. I would not mind a 10 ms sleep.
'pci_vpd_pci22_wait' uses 100us(10x10us delay) for reading, there is 1ms
(100x10us delay) in my patch, because 100us max. delay was too little for
Realtek. I tried the patch (with 1ms) on 8169,8168b and 8102e HW without
any problem. IMHO Realtek's 10ms delay (usually used for VPD write access)
is too much...

Ivan

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