linux-kernel - Re: [PATCH] Intel: Skylake: Fix inconsistent IS_ERR and PTR

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Message-ID: <1247da797bc0a860e845989241385e124e589063.camel@perches.com>
Date:   Fri, 21 Feb 2020 06:41:32 -0800
From:   Joe Perches <joe@...ches.com>
To:     Xu Wang <vulab@...as.ac.cn>, perex@...ex.cz, tiwai@...e.com,
        alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Intel: Skylake: Fix inconsistent IS_ERR and PTR_ERR

On Fri, 2020-02-21 at 18:11 +0800, Xu Wang wrote:
> PTR_ERR should access the value just tested by IS_ERR.
> In skl_clk_dev_probe(),it is inconsistent.
[]
> diff --git a/sound/soc/intel/skylake/skl-ssp-clk.c b/sound/soc/intel/skylake/skl-ssp-clk.c
[]
> @@ -384,7 +384,7 @@ static int skl_clk_dev_probe(struct platform_device *pdev)
>  				&clks[i], clk_pdata, i);
>  
>  		if (IS_ERR(data->clk[data->avail_clk_cnt])) {
> -			ret = PTR_ERR(data->clk[data->avail_clk_cnt++]);
> +			ret = PTR_ERR(data->clk[data->avail_clk_cnt]);

NAK.

This is not inconsistent and you are removing the ++
which is a post increment.  Likely that is necessary.

You could write the access and the increment as two
separate statements if it confuses you.