Re: [PATCH v6 0/3] PCI: Refactor PCIe speed validation and conversion functions

[Shawn Lin <shawn.lin@rock-chips.com>]

在 2026/04/06 星期一 18:56, Hans Zhang 写道:
> This series refactors PCIe speed validation and conversion logic to
> shared functions in the public header, eliminating code duplication
> and ensuring consistency across drivers.
> 

Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>

> ---
> Changes for v6:
> - missing one line of code:
>    link_speed = pcie_get_link_speed(pci->max_link_speed);
> 
> Changes for v5:
> https://patchwork.kernel.org/project/linux-pci/patch/20260406104708.1218648-1-18255117159@163.com/
> 
> - Rebase to v7.0-rc1. (pci/next tree)
> 
> Changes for v4:
> https://patchwork.kernel.org/project/linux-pci/patch/20251102143206.111347-1-18255117159@163.com/
> 
> - Maintain O(1) array-based lookup for speed conversion (addressing
>    performance concerns from v3 feedback)
> - Move pcie_valid_speed() and pci_bus_speed2lnkctl2() to pci.h
> - Update dwc driver to use the shared functions
> - Rebase to v6.18-rc3.
> 
> This addresses the feedback from Lukas Wunner and Manivannan Sadhasivam
> on the v3 submission, ensuring no runtime performance regression while
> achieving code reuse.
> 
> Changes for v3:
> https://patchwork.kernel.org/project/linux-pci/patch/20250816154633.338653-1-18255117159@163.com/
> 
> - Rebase to v6.17-rc1.
> - Gentle ping.
> 
> Changes for v2:
> - s/PCIE_SPEED2LNKCTL2_TLS_ENC/PCIE_SPEED2LNKCTL2_TLS
> - The patch commit message were modified.
> ---
> 
> Hans Zhang (3):
>    PCI: Add public pcie_valid_speed() for shared validation
>    PCI: Move pci_bus_speed2lnkctl2() to public header
>    PCI: dwc: Use common speed conversion function
> 
>   drivers/pci/controller/dwc/pcie-designware.c | 18 +++-------------
>   drivers/pci/pci.h                            | 22 ++++++++++++++++++++
>   drivers/pci/pcie/bwctrl.c                    | 22 --------------------
>   3 files changed, 25 insertions(+), 37 deletions(-)
> 
> 
> base-commit: 525e91d84dc085492b36d4b87abb7c1cc93fcb44