linux-kernel - Re: [PATCH] mtd: spi-nor: intel: use ERR

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Message-ID: <b5a20a54-70c8-c64b-bb8f-bec0702426f9@gmail.com>
Date:   Tue, 14 Feb 2017 05:49:39 +0100
From:   Marek Vasut <marek.vasut@...il.com>
To:     Nicholas Mc Guire <der.herr@...r.at>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Richard Weinberger <richard@....at>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: spi-nor: intel: use ERR_CAST in return statement

On 02/13/2017 09:14 AM, Nicholas Mc Guire wrote:
> This fixes a sparse warning about incorrect type in retrun expression
> 
> Signed-off-by: Nicholas Mc Guire <der.herr@...r.at>
> ---
> 
> V2: fixed prefix and the truncated commit message noted by Boris Brezillon
>     <boris.brezillon@...e-electrons.com> - thanks!
> 
> sparse complained about:
> drivers/mtd/spi-nor/intel-spi.c:731:28: warning: incorrect type in return expression (different address spaces)
> drivers/mtd/spi-nor/intel-spi.c:731:28:    expected struct intel_spi *
> drivers/mtd/spi-nor/intel-spi.c:731:28:    got void [noderef] <asn:2>*base
> 
> Patch was compile tested with: multi_v7_defconfig (implies CONFIG_MTD_SPI_NOR=y)

Was this driver even enabled with multi_v7 and MTD_SPI_NOR=y ?
Nonetheless, the patch is correct:

Acked-by: Marek Vasut <marek.vasut@...il.com>

> Patch is against 4.10-rc7 (localversion-next is next-20170213)
> 
>  drivers/mtd/spi-nor/intel-spi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/spi-nor/intel-spi.c b/drivers/mtd/spi-nor/intel-spi.c
> index 2956f2c..1a6de4b 100644
> --- a/drivers/mtd/spi-nor/intel-spi.c
> +++ b/drivers/mtd/spi-nor/intel-spi.c
> @@ -728,7 +728,7 @@ struct intel_spi *intel_spi_probe(struct device *dev,
>  
>  	ispi->base = devm_ioremap_resource(dev, mem);
>  	if (IS_ERR(ispi->base))
> -		return ispi->base;
> +		return ERR_CAST(ispi->base);
>  
>  	ispi->dev = dev;
>  	ispi->info = info;
> 


-- 
Best regards,
Marek Vasut