Re: [PATCH] net-tg3: Initialize REG_BASE_ADDR at PCI config offset 120 to 0

[Michael Chan <mchan@broadcom.com>]

On Mon, 2013-12-09 at 10:43 -0800, Nat Gurumoorthy wrote: 
> The new tg3 driver leaves REG_BASE_ADDR (PCI config offset 120)
> uninitialized. From power on reset this register may have garbage in it. The
> Register Base Address register defines the device local address of a
> register. The data pointed to by this location is read or written using
> the Register Data register (PCI config offset 128). When REG_BASE_ADDR has
> garbage any read or write of Register Data Register (PCI 128) will cause the
> PCI bus to lock up. The TCO watchdog will fire and bring down the system.
> 
> 
Is this to prevent problem from other software that may be scanning the
PCI config space?  It won't help if this happens before the tg3 driver
is loaded, right?

Thanks.