linux-kernel - Re: [PATCH v2 09/10] PCI: Add function to convert lnkctl2speed to pci_bus

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Message-ID: <20250313171637.GA739165@bhelgaas>
Date: Thu, 13 Mar 2025 12:16:37 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	Johannes Berg <johannes@...solutions.net>,
	Jeff Johnson <jjohnson@...nel.org>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	mhi@...ts.linux.dev, linux-wireless@...r.kernel.org,
	ath11k@...ts.infradead.org, quic_pyarlaga@...cinc.com,
	quic_vbadigan@...cinc.com, quic_vpernami@...cinc.com,
	quic_mrana@...cinc.com,
	Jeff Johnson <jeff.johnson@....qualcomm.com>
Subject: Re: [PATCH v2 09/10] PCI: Add function to convert lnkctl2speed to
 pci_bus_speed

On Thu, Mar 13, 2025 at 05:10:16PM +0530, Krishna Chaitanya Chundru wrote:
> Add a exported function to convert lnkctl2speed to enum pci_bus_speed,
> so that other kernel drivers can use it.
> 
> Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> ---
>  drivers/pci/pci.c   | 12 ++++++++++++
>  include/linux/pci.h |  1 +
>  2 files changed, 13 insertions(+)
> 
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index 869d204a70a3..75505437a9c9 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -6011,6 +6011,18 @@ int pcie_link_speed_mbps(struct pci_dev *pdev)
>  }
>  EXPORT_SYMBOL(pcie_link_speed_mbps);
>  
> +/**
> + * pci_lnkctl2_bus_speed - converts lnkctl2 speed to pci_bus_speed

I try to use imperative mood ("convert lnkctl2") to match commit log
style.

> + * @speed: LNKCAP2 SLS value
> + *
> + * Returns pci_bus_speed

Not sure how strict kernel-doc is about this, but I've been told
it wants "Return:" with a colon here:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/doc-guide/kernel-doc.rst?id=v6.13#n142