linux-kernel - Re: [PATCH] drivers/mtd/nand/bcm_umi

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Date:	Wed, 10 Aug 2011 16:01:43 +1000
From:	Ryan Mallon <rmallon@...il.com>
To:	Julia Lawall <julia@...u.dk>
CC:	Jiandong Zheng <jdzheng@...adcom.com>,
	kernel-janitors@...r.kernel.org,
	Scott Branden <sbranden@...adcom.com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/mtd/nand/bcm_umi_nand.c: add missing kfree/ioremap

On 10/08/11 15:42, Julia Lawall wrote:
> From: Julia Lawall<julia@...u.dk>
>
> The error handling code under the #if should be the same as elsewhere in
> the function.
>
> Signed-off-by: Julia Lawall<julia@...u.dk>
>
> ---
>   drivers/mtd/nand/bcm_umi_nand.c |    5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/nand/bcm_umi_nand.c b/drivers/mtd/nand/bcm_umi_nand.c
> index a8ae898..72e8ec2 100644
> --- a/drivers/mtd/nand/bcm_umi_nand.c
> +++ b/drivers/mtd/nand/bcm_umi_nand.c
> @@ -433,8 +433,11 @@ static int __devinit bcm_umi_nand_probe(struct platform_device *pdev)
>
>   #if USE_DMA
>   	err = nand_dma_init();
> -	if (err != 0)
> +	if (err != 0) {
> +		iounmap(bcm_umi_io_base);
> +		kfree(board_mtd);
>   		return err;
> +	}
>   #endif

This probe function should possibly use goto exits on failure. It 
reduces a bit of code duplication and helps prevent this type of error.

~Ryan

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