linux-kernel - Re: [RFC,v14 2/5] of/irq: Adjust of_pci

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Date:   Wed, 8 Feb 2023 12:44:44 +0100
From:   Thierry Reding <thierry.reding@...il.com>
To:     Manikanta Maddireddy <mmaddireddy@...dia.com>
Cc:     bhelgaas@...gle.com, petlozup@...dia.com,
        rafael.j.wysocki@...el.com, lpieralisi@...nel.org, robh@...nel.org,
        jeffy.chen@...k-chips.com, krzysztof.kozlowski+dt@...aro.org,
        jonathanh@...dia.com, dmitry.osipenko@...labora.com,
        viresh.kumar@...aro.org, gregkh@...uxfoundation.org,
        steven.price@....com, kw@...ux.com, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        vidyas@...dia.com
Subject: Re: [RFC,v14 2/5] of/irq: Adjust of_pci_irq parsing for multiple
 interrupts

On Wed, Feb 08, 2023 at 04:46:42PM +0530, Manikanta Maddireddy wrote:
> From: Jeffy Chen <jeffy.chen@...k-chips.com>
> 
> Currently we are considering the first irq as the PCI interrupt pin,
> but a PCI device may have multiple interrupts(e.g. PCIe WAKE# pin).
> 
> Only parse the PCI interrupt pin when the irq is unnamed or named as
> "pci".
> 
> Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
> Signed-off-by: Manikanta Maddireddy <mmaddireddy@...dia.com>
> ---
> 
> Changes in v14:
> Address Rob's comment on using of_property_match_string().
> 
> Changes in v13: None
> Changes in v12: None
> Changes in v11:
> Address Brian's comments.
> 
> Changes in v10: None
> Changes in v9: None
> Changes in v8: None
> Changes in v7: None
> Changes in v6: None
> Changes in v5: None
> Changes in v3: None
> Changes in v2: None
> 
>  drivers/pci/of.c | 14 +++++++++++---
>  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pci/of.c b/drivers/pci/of.c
> index 196834ed44fe..ff897c40ed71 100644
> --- a/drivers/pci/of.c
> +++ b/drivers/pci/of.c
> @@ -429,9 +429,17 @@ static int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *
>  	 */
>  	dn = pci_device_to_OF_node(pdev);
>  	if (dn) {
> -		rc = of_irq_parse_one(dn, 0, out_irq);
> -		if (!rc)
> -			return rc;
> +		int index = 0;

No need to initialize to 0 here since you're assigning to it immediately
below.

Otherwise, looks good, so with that initialization dropped, this is:

Reviewed-by: Thierry Reding <treding@...dia.com>

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