linux-kernel - Re: [PATCH v2 3/4] staging: hikey9xx: phy-hi3670-usb3.c: hi3670_is_abbclk

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Date:   Thu, 14 Jan 2021 09:56:41 -0800
From:   Joe Perches <joe@...ches.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Vinod Koul <vkoul@...nel.org>
Cc:     Alex Dewar <alex.dewar90@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Yu Chen <chenyu56@...wei.com>, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] staging: hikey9xx: phy-hi3670-usb3.c:
 hi3670_is_abbclk_seleted() returns bool

On Thu, 2021-01-14 at 18:35 +0100, Mauro Carvalho Chehab wrote:
> Instead of using 1/0 for true/false, change the type to boolean
> and change the returned value.
[]
> diff --git a/drivers/staging/hikey9xx/phy-hi3670-usb3.c b/drivers/staging/hikey9xx/phy-hi3670-usb3.c
[]
> @@ -326,24 +326,24 @@ static int hi3670_phy_set_params(struct hi3670_priv *priv)
>  	return ret;
>  }
> 
> -static int hi3670_is_abbclk_seleted(struct hi3670_priv *priv)
> +static bool hi3670_is_abbclk_seleted(struct hi3670_priv *priv)

Presumably this should be "selected" not "seleted"

>  {
>  	u32 reg;
> 
>  	if (!priv->sctrl) {
>  		dev_err(priv->dev, "priv->sctrl is null!\n");
> -		return 1;
> +		return true;
>  	}
> 
>  	if (regmap_read(priv->sctrl, SCTRL_SCDEEPSLEEPED, &reg)) {
>  		dev_err(priv->dev, "SCTRL_SCDEEPSLEEPED read failed!\n");
> -		return 1;
> +		return true;
>  	}
> 
>  	if ((reg & USB_CLK_SELECTED) == 0)
> -		return 1;
> +		return true;
> 
> -	return 0;
> +	return false;
>  }

	if (foo)
		return true;
	return false;

should generally be consolidated into a single test.

So this is perhaps better as:

	return (!(reg & USB_CLK_SELECTED));

But the return value seems backwards.