Re: Kernel fix for ICH7M controller

[Jeff Garzik <jeff@garzik.org>]

Tejun Heo wrote:
> Jonathan Dieter wrote:
>> The ata_piix module doesn't detect that my laptop's disk controller 
>> (Intel Corporation 82801GBM/GHM - ICH7 Family) is configured to have 
>> PATA drives in the first two channels.  I looked at Intel's 
>> documentation and they say that my controller isn't supposed to 
>> support this configuration, but it's the default setup on this laptop, 
>> there's no way to change it in the BIOS, and it works in Windows, so 
>> I'm assuming this is a documentation error.
>>
>> This patch changes one line in ata_piix.c so that it sees this 
>> configuration as valid (and therefore recognizes my drives).  I've 
>> tested it on my laptop and the module is now working perfectly 
>> (whereas the kernel was using the old IDE driver previously with no 
>> DMA enabled).
> 
> Hello,
> 
> Interesting.  Can you post the result of 'lspci -n -vvv -xxx'?  I don't 
> see why this support shouldn't go into mainline but wanna see if 
> narrowing down the effect a bit (if PCI ID allows us to) would be a good 
> idea.

FWIW several PCI devices use the ich6m info entry.  We may want to split 
out ICH7M rather than assume other chips behave similarly.

	Jeff




-- 
VGER BF report: H 0