linux-kernel - Re: [PATCH 13/22] mtd: nand: lpc32xx: return error code of nand_scan

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Message-ID: <20161106192743.00e401ec@bbrezillon>
Date:   Sun, 6 Nov 2016 19:27:43 +0100
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-mtd@...ts.infradead.org,
        Sylvain Lemieux <slemieux.tyco@...il.com>,
        linux-kernel@...r.kernel.org,
        Brian Norris <computersforpeace@...il.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Vladimir Zapolskiy <vz@...ia.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 13/22] mtd: nand: lpc32xx: return error code of
 nand_scan_ident/tail() on error

On Fri,  4 Nov 2016 19:43:01 +0900
Masahiro Yamada <yamada.masahiro@...ionext.com> wrote:

> The nand_scan_ident/tail() returns an appropriate error value when
> it fails.  Use it instead of the fixed error code -ENXIO.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
> 
>  drivers/mtd/nand/lpc32xx_mlc.c | 10 ++++------
>  drivers/mtd/nand/lpc32xx_slc.c |  9 +++------
>  2 files changed, 7 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/mtd/nand/lpc32xx_mlc.c b/drivers/mtd/nand/lpc32xx_mlc.c
> index 8523881..5553a5d 100644
> --- a/drivers/mtd/nand/lpc32xx_mlc.c
> +++ b/drivers/mtd/nand/lpc32xx_mlc.c
> @@ -747,10 +747,9 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
>  	 * Scan to find existance of the device and
>  	 * Get the type of NAND device SMALL block or LARGE block
>  	 */
> -	if (nand_scan_ident(mtd, 1, NULL)) {
> -		res = -ENXIO;
> +	res = nand_scan_ident(mtd, 1, NULL);
> +	if (res)
>  		goto err_exit3;
> -	}
>  
>  	host->dma_buf = devm_kzalloc(&pdev->dev, mtd->writesize, GFP_KERNEL);
>  	if (!host->dma_buf) {
> @@ -793,10 +792,9 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
>  	 * Fills out all the uninitialized function pointers with the defaults
>  	 * And scans for a bad block table if appropriate.
>  	 */
> -	if (nand_scan_tail(mtd)) {
> -		res = -ENXIO;
> +	res = nand_scan_tail(mtd);
> +	if (res)
>  		goto err_exit4;
> -	}
>  
>  	mtd->name = DRV_NAME;
>  
> diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c
> index 8d3edc3..f1094e5 100644
> --- a/drivers/mtd/nand/lpc32xx_slc.c
> +++ b/drivers/mtd/nand/lpc32xx_slc.c
> @@ -894,10 +894,9 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
>  	}
>  
>  	/* Find NAND device */
> -	if (nand_scan_ident(mtd, 1, NULL)) {
> -		res = -ENXIO;
> +	res = nand_scan_ident(mtd, 1, NULL);
> +	if (res)
>  		goto err_exit3;
> -	}
>  
>  	/* OOB and ECC CPU and DMA work areas */
>  	host->ecc_buf = (uint32_t *)(host->data_buf + LPC32XX_DMA_DATA_SIZE);
> @@ -929,10 +928,8 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
>  	/*
>  	 * Fills out all the uninitialized function pointers with the defaults
>  	 */
> -	if (nand_scan_tail(mtd)) {
> -		res = -ENXIO;
> +	res = nand_scan_tail(mtd);

You miss

	if (res)

here.

No need to resend, I'll fix it when applying the patches.

>  		goto err_exit3;
> -	}
>  
>  	mtd->name = "nxp_lpc3220_slc";
>  	res = mtd_device_register(mtd, host->ncfg->parts,