Re: [PATCH v2] PCI: loongson: Do not ignore downstream devices on external bridges

From: Manivannan Sadhasivam

Date: Tue May 12 2026 - 04:53:53 EST



On Fri, 01 May 2026 02:45:23 +0800, Rong Zhang wrote:
> Loongson PCI host controllers have a hardware quirk that requires
> software to ignore downstream devices with device number > 0 on the
> internal bridges. The current implementation applies the workaround to
> all non-root buses, which breaks external bridges (e.g., PCIe switches)
> with multiple downstream devices.
>
> Fix it by only applying the workaround to internal bridges.
>
> [...]

Applied, thanks!

[1/1] PCI: loongson: Do not ignore downstream devices on external bridges
commit: 1389ab9bf9f627d4daed86f492091b00f110aa86

Best regards,
--
Manivannan Sadhasivam <mani@xxxxxxxxxx>