linux-kernel - Re: [v4 4/4] PCI: cadence: Use cdns_pcie_find_*capability to find capability offset instead of hardcore

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250321131806.34xeuaw2itl6gilj@thinkpad>
Date: Fri, 21 Mar 2025 18:48:06 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Hans Zhang <18255117159@....com>
Cc: lpieralisi@...nel.org, kw@...ux.com, robh@...nel.org,
	bhelgaas@...gle.com, jingoohan1@...il.com,
	thomas.richard@...tlin.com, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [v4 4/4] PCI: cadence: Use cdns_pcie_find_*capability to find
 capability offset instead of hardcore

On Fri, Mar 21, 2025 at 06:17:10PM +0800, Hans Zhang wrote:
> The offset address of capability or extended capability designed by
> different SOC design companies may not be the same. Therefore, a flexible
> public API is required to find the offset address of a capability or
> extended capability in the configuration space.
> 

The PCIe capability/extended capability offsets are not guaranteed to be
the same across all SoCs integrating the Cadence PCIe IP. Hence, use the
cdns_pcie_find_{ext}_capability() APIs for finding them.

This avoids hardcoding the offsets in the driver.

- Mani

-- 
மணிவண்ணன் சதாசிவம்