linux-kernel - Re: [PATCH v2]ipmi:bt-bmc:Avoid unnecessary judgement

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Date:   Tue, 7 Apr 2020 08:40:12 -0500
From:   Corey Minyard <minyard@....org>
To:     Tang Bin <tangbin@...s.chinamobile.com>
Cc:     arnd@...db.de, gregkh@...uxfoundation.org,
        openipmi-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2]ipmi:bt-bmc:Avoid unnecessary judgement

On Mon, Apr 06, 2020 at 12:34:15PM +0800, Tang Bin wrote:
> In this driver,only the platform_device and platform_driver
> matches,can trigger bt_bmc_probe(),and the trigger mode is
> just Device Tree.Thus remove redundant judgments.

How about the following commit message:

bt_bmc_probe() is only called with an openfirmware platform device.
Therefore there is no need to check that the passed in device is NULL or
that it has an openfirmware node.

Also, how did you find this?

Thanks,

-corey

> 
> Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
> ---
> Changes from v1:
>  - improve the commit message.
> 
>  drivers/char/ipmi/bt-bmc.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/char/ipmi/bt-bmc.c b/drivers/char/ipmi/bt-bmc.c
> index d36aeacb2..890ad55aa 100644
> --- a/drivers/char/ipmi/bt-bmc.c
> +++ b/drivers/char/ipmi/bt-bmc.c
> @@ -430,9 +430,6 @@ static int bt_bmc_probe(struct platform_device *pdev)
>  	struct device *dev;
>  	int rc;
>  
> -	if (!pdev || !pdev->dev.of_node)
> -		return -ENODEV;
> -
>  	dev = &pdev->dev;
>  	dev_info(dev, "Found bt bmc device\n");
>  
> -- 
> 2.20.1.windows.1
> 
> 
>