Re: [loongson-PATCH-v1 24/27] fixup for FUJITSU disk

[Sergei Shtylyov <sshtylyov@ru.mvista.com>]

Bartlomiej Zolnierkiewicz wrote:

> > yanh 写道:
> [...]
> > > the cs5536 pata driver have some geode platform dependent codes. We can
> > > just ignore it, but the performance is poor(using hdparm to test it),
> > > which only get 22+ MB/s. we find it only use udma2. However if using
> > > amd74xx driver, it can set udma5, and the speed can reach to 50+ MB/s. 
> > > we will test whether this driver is working well without this patch.
> > > Anyway, thanks your advice.
> > Use the driver drivers/ata/pata_cs5536.c, unfortunately it also have the 
> > same issue.
> Both drivers (pata_cs5536 & cs5536) should handle UDMA5.
> Could you please explain the issue with platform specific code a bit more?
> Is it related to a cable detection by any chance?
   I guess it's rdmsr()/wrmsr()...

> Thanks.
> Bart
MBR, Sergei