linux-kernel - Re: Unknown SATA PIIX PCI device ID 0x29b6

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Date:	Sun, 09 Mar 2008 14:14:35 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Jeff Garzik <jeff@...zik.org>, linux-ide@...r.kernel.org
Subject: Re: Unknown SATA PIIX PCI device ID 0x29b6

Guennadi Liakhovetski wrote:
> On Fri, 7 Mar 2008, Tejun Heo wrote:
> 
>>> Looks like almost a minute to me? On another occurence I see about 1.5 
>>> minutes, then "port is slow to respond, please be patient (Status 0x80)" 
>>> has been repeated 3 times. On cold-plug also 3 times, I think, about the 
>>> same time then (time is not updated in the log).
>> I see.  Does the attached patch make any difference?
> 
> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> index 4fbcce7..abebdcc 100644
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -6712,6 +6712,7 @@ int sata_link_init_spd(struct ata_link *link)
>  	spd = (scontrol >> 4) & 0xf;
>  	if (spd)
>  		link->hw_sata_spd_limit &= (1 << spd) - 1;
> +	link->hw_sata_spd_limit = 1;
>  
>  	ata_force_spd_limit(link);
>  
> Hm, this would force 1.5Gbps on all ports and devices, right? Cannot I 
> just boot with "libata.force=4:1.5Gbps"?

Yeap, you can do that.  Wasn't sure you were using .25-rc or .24.

Thanks.

-- 
tejun
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