linux-kernel - Re: [PATCH] mtd: nand: mtk: fix error return code in mtk_ecc

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Date:   Sun, 13 Aug 2017 10:02:12 +0200
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-mtd@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: nand: mtk: fix error return code in
 mtk_ecc_probe()

Le Wed, 9 Aug 2017 11:35:21 -0500,
"Gustavo A. R. Silva" <gustavo@...eddedor.com> a écrit :

> platform_get_irq() returns an error code, but the mtk_ecc driver
> ignores it and always returns -EINVAL. This is not correct and,
> prevents -EPROBE_DEFER from being propagated properly.
> 
> Print and propagate the return value of platform_get_irq on failure.
> 
> This issue was detected with the help of Coccinelle.

Applied.

Thanks,

Boris

> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> ---
>  drivers/mtd/nand/mtk_ecc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mtd/nand/mtk_ecc.c b/drivers/mtd/nand/mtk_ecc.c
> index 6c3a4aa..7f3b065 100644
> --- a/drivers/mtd/nand/mtk_ecc.c
> +++ b/drivers/mtd/nand/mtk_ecc.c
> @@ -464,8 +464,8 @@ static int mtk_ecc_probe(struct platform_device *pdev)
>  
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0) {
> -		dev_err(dev, "failed to get irq\n");
> -		return -EINVAL;
> +		dev_err(dev, "failed to get irq: %d\n", irq);
> +		return irq;
>  	}
>  
>  	ret = dma_set_mask(dev, DMA_BIT_MASK(32));