linux-kernel - Re: [patch] mtd: pxa3xx_nand: NULL dereference in pxa3xx_nand

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Date:	Thu, 06 Jan 2011 14:45:01 +0100
From:	Sven Neumann <s.neumann@...mfeld.com>
To:	Dan Carpenter <error27@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mtd@...ts.infradead.org, Daniel Mack <daniel@...aq.de>,
	leiwen@...vell.com, haojian.zhuang@...vell.com,
	David.Woodhouse@...el.com, eric.y.miao@...il.com,
	Artem.Bityutskiy@...ia.com
Subject: Re: [patch] mtd: pxa3xx_nand: NULL dereference in pxa3xx_nand_probe

Hi Dan,

On Thu, 2011-01-06 at 15:45 +0300, Dan Carpenter wrote:

> Could you test this patch?  I don't have an arm so I can't compile this.

Yes, this change fixes the boot problem for me. Thanks for the quick
help.

> This was introduced in 18c81b1828f8 "mtd: pxa3xx_nand: remove the flash
> info in driver structure"
> 
> Signed-off-by: Dan Carpenter <error27@...il.com>

Tested-by: Sven Neumann <s.neumann@...mfeld.com>

> diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
> index 17f8518..ea2c288 100644
> --- a/drivers/mtd/nand/pxa3xx_nand.c
> +++ b/drivers/mtd/nand/pxa3xx_nand.c
> @@ -885,6 +885,7 @@ static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
>  	/* set info fields needed to __readid */
>  	info->read_id_bytes = (info->page_size == 2048) ? 4 : 2;
>  	info->reg_ndcr = ndcr;
> +	info->cmdset = &default_cmdset;
>  
>  	if (__readid(info, &id))
>  		return -ENODEV;
> @@ -915,7 +916,6 @@ static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
>  
>  	info->ndtr0cs0 = nand_readl(info, NDTR0CS0);
>  	info->ndtr1cs0 = nand_readl(info, NDTR1CS0);
> -	info->cmdset = &default_cmdset;
>  
>  	return 0;
>  }
> 


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