linux-kernel - Re: [PATCH 4/4] drivers/mmc/host/mxs-mmc.c: fix error return code

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Message-Id: <201209171209.28173.marex@denx.de>
Date:	Mon, 17 Sep 2012 12:09:28 +0200
From:	Marek Vasut <marex@...x.de>
To:	Peter Senna Tschudin <peter.senna@...il.com>
Cc:	cjb@...top.org, shawn.guo@...aro.org,
	broonie@...nsource.wolfsonmicro.com, vinod.koul@...ux.intel.com,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 4/4] drivers/mmc/host/mxs-mmc.c: fix error return code

Dear Peter Senna Tschudin,

> From: Peter Senna Tschudin <peter.senna@...il.com>

The patch description is a bit crap, but otherwise

Acked-by: Marek Vasut <marex@...x.de>

> Convert a nonnegative error return code to a negative one, as returned
> elsewhere in the function.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> (
> if@p1 (\(ret < 0\|ret != 0\))
>  { ... return ret; }
> 
> ret@p1 = 0
> )
> ... when != ret = e1
>     when != &ret
> *if(...)
> {
>   ... when != ret = e2
>       when forall
>  return ret;
> }
> // </smpl>
> 
> Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>
> ---
>  drivers/mmc/host/mxs-mmc.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
> index 80d1e6d..afd8fdd 100644
> --- a/drivers/mmc/host/mxs-mmc.c
> +++ b/drivers/mmc/host/mxs-mmc.c
> @@ -674,6 +674,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
>  	if (!ssp->dmach) {
>  		dev_err(mmc_dev(host->mmc),
>  			"%s: failed to request dma\n", __func__);
> +		ret = -ENODEV;
>  		goto out_clk_put;
>  	}

Best regards,
Marek Vasut
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