Hi!
> We have some hardware that takes about 30 seconds to setup common clocks for
> ASPM, but our bios'es don't actually allow ASPM. It seems we had this thing in
> place where we would disable ASPM after the pci bus probe so that we would make
> sure that pre pcie 1.1 devices would be properly skipped during initialization.
> This is because the mechanism to disable ASPM doesn't actually disable the
> setting up of the link state stuff, it just keeps us from changing the link
> state after the fact. So instead make it so that when we call pcie_no_aspm()
> that we disable ASPM completley, that is we skip setting up the link state and
> everything. This way we avoid the costly setup for a feature we cannot support
> in the first place and we also make sure we are safe from future tampering with
> the ASPM link state. Thanks,
On thinkpad x60, I have similar problem.
I'm carying this for long long time now:
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index a32ba75..5eb7621 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -700,7 +700,7 @@ static int __init acpi_pci_init(void)
if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) {
pr_info("ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n");
- pcie_no_aspm();
+// pcie_no_aspm();
}
ret = register_acpi_bus_type(&acpi_pci_bus);
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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