Re: Sata Sil3512 bug?; Promise SATA300 TX4

[Tejun Heo <htejun@gmail.com>]

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Alexander Sabourenkov wrote:
> Hello.
> 
>> So, my bet for your second report is your hardware went through
>> something similar as above.
>>
> 
> Thanks for the insight. Let's dismiss it then.
> 
> Back to the TX4, I tried libata-dev.git cloned at about 20:00 UTC 19.10,
>   no perceived difference - parallel read from two drives causes a lot
> of  errors.
> 
> dmesgs  with boot and errors are at http://lxnt.info/linux/libata-dev/
> 
> I don't know what to try next. Any ideas?
> 

Does the attached patch help?

-- 
tejun

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diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 68699b3..4c93fee 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6435,6 +6435,7 @@ 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;
 
 	link->sata_spd_limit = link->hw_sata_spd_limit;