On Sun, 06 Jul 2008 23:15:03 +0900 Tejun Heo <tj@xxxxxxxxxx> wrote: > Some BIOSen enable DIPM via _GTF which causes command timeouts under > certain configuration. This didn't occur on 2.6.25 because 2.6.25 > defaulted to SRST, so _GTF wasn't executed during boot probe, so ahci > host reset disabled DIPM and as _GTF wasn't executed after SRST, DIPM > wasn't enabled. On 2.6.26, hardreset is used during probe and after > probe _GTF is executed enabling DIPM and thus the failures. > > This patch could theoretically disable DIPM on machines which used to > have it enabled on 2.6.25 but AFAIK ahci is currently the only driver > which uses SATA ACPI hierarchy (_SDD) and as the host reset would have > always disabled DIPM, this shouldn't happen. > > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> Acked-by: Alan Cox <alan@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
