On Mon, Jul 26, 2010 at 03:31:28PM -0700, Luis R. Rodriguez wrote: > On Mon, Jul 26, 2010 at 3:29 PM, Matthew Garrett <mjg59@xxxxxxxxxxxxx> wrote: > > On Mon, Jul 26, 2010 at 03:26:37PM -0700, Luis R. Rodriguez wrote: > > > >> What I meant was that the PCI config space would already have L1 > >> enabled if L1 worked, so I don't see why we would need to nitpick out > >> specifics here. All Atheros PCIE chips should work with L1. The advise > >> given is to disable L0s though. I believe AR2425 would be one which > >> likely had L0s enabled but requires it to be disabled. Not sure of > >> others. But this is why I am saying this can be done globally for all > >> ath5k chipsets. > > > > If L1 is set but the chip is pre-PCIe 1.1 then we'll disable L1 unless > > the driver tells us that it's functional. The .inf from the Windows > > driver seemed to suggest that only a subset of the chips re-enabled L1 > > there, but if it's ok in general then that's a straightforward one-line > > patch. > > But why can't we just rely on what the device already has on its PCI > config space and only ensure to disable L0s? Because we globally disable ASPM on pre-1.1 devices, because that's what Windows does. It makes it easier for us to figure out what level of support we can expect from different hardware revisions. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
