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Message-ID: <fdf5ea08-f3a1-3c9f-66a3-1cfa3743dae2@kernel.org>
Date:   Fri, 2 Jun 2023 21:13:25 +0900
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Subject: Re: [PATCH v6 2/9] PCI: endpoint: Pass EPF device ID to the probe
 function
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To:     Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        lpieralisi@kernel.org, kw@linux.com
Cc:     kishon@kernel.org, bhelgaas@google.com, linux-pci@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
References: <20230602114756.36586-1-manivannan.sadhasivam@linaro.org>
 <20230602114756.36586-3-manivannan.sadhasivam@linaro.org>
From:   Damien Le Moal <dlemoal@kernel.org>
Organization: Western Digital Research
In-Reply-To: <20230602114756.36586-3-manivannan.sadhasivam@linaro.org>
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On 6/2/23 20:47, Manivannan Sadhasivam wrote:
> Currently, the EPF probe function doesn't get the device ID argument needed
> to correctly identify the device table ID of the EPF device.
> 
> When multiple entries are added to the "struct pci_epf_device_id" table,
> the probe function needs to identify the correct one. This is achieved by
> modifying the pci_epf_match_id() function to return the match ID pointer
> and passing it to the driver's probe function.
> 
> pci_epf_device_match() function can return bool based on the return value
> of pci_epf_match_id().
> 
> Reviewed-by: Kishon Vijay Abraham I <kishon@kernel.org>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

[...]

>  static int pci_epf_device_match(struct device *dev, struct device_driver *drv)
> @@ -510,8 +510,12 @@ static int pci_epf_device_match(struct device *dev, struct device_driver *drv)
>  	struct pci_epf *epf = to_pci_epf(dev);
>  	struct pci_epf_driver *driver = to_pci_epf_driver(drv);
>  
> -	if (driver->id_table)
> -		return pci_epf_match_id(driver->id_table, epf);
> +	if (driver->id_table) {
> +		if (pci_epf_match_id(driver->id_table, epf))
> +			return true;
> +		else
> +			return false;

You prefer keeping this pattern ?

return pci_epf_match_id(driver->id_table, epf) != NULL;

is no much nicer !

Anyway:

Reviewed-by: Damien Le Moal <dlemoal@kernel.org>

-- 
Damien Le Moal
Western Digital Research