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Date: Tue, 18 Jul 2006 22:07:44 +0400 From: Sergei Shtylyov <sshtylyov@...mvista.com> To: Mikael Pettersson <mikpe@...uu.se> Cc: albertcc@...ibm.com, linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org, alan@...hat.com Subject: Re: libata pata_pdc2027x success on sparc64 Hello. Mikael Pettersson wrote: > In contrast, the old IDE pdc202xx_new driver had lots > of problems with CRC errors causing it to disable DMA. Hm, from my experience it usually falls back to UltraDMA/44 and then the thing startrt working... > I wasn't able to manually tune it above udma3 without > getting more errors. This isn't sparc64-specific: I've > had similar negative experience with the old IDE Promise > drivers in a PowerMac. This happens because the "old" driver misses the PLL calibration code. You may want to try these Albert's patches: http://marc.theaimsgroup.com/?t=110992452800002&r=1&w=2 http://marc.theaimsgroup.com/?t=110992471500002&r=1&w=2 http://marc.theaimsgroup.com/?t=110992490100002&r=1&w=2 http://marc.theaimsgroup.com/?t=111019238400003&r=1&w=2 It looks like they were never considered for accepting into the kernel while they succesfully solve this issue. Maybe Albert could try pushing them into -mm tree once more? WBR, Sergei - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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