Re: [PATCH v7] PCI: loongson: Override PCIe bridge supported speeds for Loongson-3C6000 series

[Xi Ruoyao]

On Thu, 2026-02-26 at 13:01 +0530, Manivannan Sadhasivam wrote:
> On Thu, Feb 26, 2026 at 03:09:34PM +0800, Xi Ruoyao wrote:
> > On Thu, 2026-02-26 at 12:01 +0530, Manivannan Sadhasivam wrote:
> > > > Cc: stable@xxxxxxxxxxxxxxx
> > > 
> > > Since this is a bug fix which needs to be backported, what is the commit SHA for
> > > the Fixes tag? The one which added Loongson-3C6000 support to this driver.
> > 
> > The PCI controller driver didn't have any change specifically for
> > Loongson-3C6000 before this one, but the kernel will only boot on
> > Loongson-3C6000 if the AVECINTC support (commit ae16f05c928a, i.e. Linux
> > 6.12+) is available.
> > 
> 
> So can you share the commit that introduced the Loongson-3C6000 platform?
> ae16f05c928a just added the AVEC support. Though this might be necessary for
> booting, this is not the actual commit that introduced the buggy platform
> support.

The 3C6000 PCIe controller is a rather "standard ACPI" device (if we
don't consider the quirks needed) so it should be already supported
since cd89edda4002 ("PCI: loongson: Add ACPI init support"), despite the
commit even predates the taping of 3C6000...

-- 
Xi Ruoyao <xry111@xxxxxxxxxxx>