Re: [PATCH v2 1/5] PCI: Use pcie_get_link_speed() in pci.c

[Ilpo Järvinen]

On Sun, 8 Nov 2026, Hans Zhang wrote:

> Replace the to_pcie_link_speed() wrapper with pcie_get_link_speed() in
> pcie_link_bandwidth_mbps() and pcie_bandwidth_available(), and remove
> the now-unused wrapper.  pcie_get_link_speed() performs the same lookup
> with bounds checking and is already exported.
> 
> Signed-off-by: Hans Zhang <18255117159@xxxxxxx>
> ---
>  drivers/pci/pci.c | 9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index 7c6f2aba8144..92ede1768caf 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -6025,11 +6025,6 @@ int pcie_set_mps(struct pci_dev *dev, int mps)
>  }
>  EXPORT_SYMBOL(pcie_set_mps);
>  
> -static enum pci_bus_speed to_pcie_link_speed(u16 lnksta)
> -{
> -	return pcie_link_speed[FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta)];
> -}
> -
>  /**
>   * pcie_link_bandwidth_mbps - get the current bandwidth of a single PCIe link
>   * @pdev: PCI device to query
> @@ -6048,7 +6043,7 @@ int pcie_link_bandwidth_mbps(struct pci_dev *pdev)
>  	if (err)
>  		return pcibios_err_to_errno(err);
>  
> -	speed = pcie_dev_speed_mbps(to_pcie_link_speed(lnksta));
> +	speed = pcie_dev_speed_mbps(pcie_get_link_speed(FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta)));

Readability seems worse due to cramming everything into a single 
statement.

>  	if (speed < 0)
>  		return speed;
>  
> @@ -6089,7 +6084,7 @@ u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
>  	while (dev) {
>  		pcie_capability_read_word(dev, PCI_EXP_LNKSTA, &lnksta);
>  
> -		next_speed = to_pcie_link_speed(lnksta);
> +		next_speed = pcie_get_link_speed(FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta));
>  		next_width = FIELD_GET(PCI_EXP_LNKSTA_NLW, lnksta);
>  
>  		next_bw = next_width * PCIE_SPEED2MBS_ENC(next_speed);
> 

-- 
 i.