[U-Boot] [PATCH 1/2] mtd/nand:Fix wrong address read in is_blank()

[Marek Vasut]

> IFC NAND Machine calculates ECC on 512byte sector. Same is taken care in
> fsl_ifc_run_command() while ECC status verification. Here buffer number is
> calculated assuming 512byte sector and same is passed to is_blank.
> However in is_blank() buffer address is calculated using mdt->writesize
> which is wrong. It should be calculated on basis of ecc sector size.
> 
> Also, in fsl_ifc_run_command() bufferpage is calculated on the basis of ecc
> sector size instead of hard coded value.
> 
> Signed-off-by: Poonam Aggrwal <poonam.aggrwal at freescale.com>
> Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>

You just sent two patches based on the same commit, but those are clearly 
dependent. This is weird. So next time:

1) Submit this with git-send-email as a series
2) iomem looks linuxish, so instead of specifying u-boot commit, specify Linux 
commit/tree etc. from where this is pulled so when someone synces next time, 
he'll know where he is in linux.
3) Cc Scott Wood

M
> ---
>  Based upon git://git.denx.de/u-boot.git (branch master)
> 
>  Top commit:
>             commit bfcc40bb09b05c90cc3b1496abb270eb8aa72134
>             Merge: cba9a89 1895420
>             Author: Wolfgang Denk <wd at denx.de>
>             Date:   Fri Dec 23 20:53:58 2011 +0100
> 
>                 Merge branch 'next' of ../next
> 
>                 * 'next' of ../next:
>                 mkenvimage: Add version info switch (-V)
>                 mkenvimage: Fix getopt() error handling
>                 mkenvimage: Fix some typos
>                 phy: add Micrel KS8721BL phy definition
>                 net: introduce per device index
>                 mvgbe: remove setting of ethaddr within the driver
>                 x86: Add support for specifying an initrd with the zboot
> command x86: Refactor the zboot innards so they can be reused with a vboot
> image x86: Add infrastructure to extract an e820 table from the coreboot
> tables x86: Add support for booting Linux using the 32 bit boot protocol
> x86: Clean up the x86 zimage code in preparation to extend it x86: Import
> code from coreboot's libpayload to parse the coreboot table x86: Initial
> commit for running as a coreboot payload CHECKPATCH:
> ./board/esd/hh405/logo_320_240_8bpp.c
>                 CHECKPATCH: ./board/esd/hh405/logo_1024_768_8bpp.c
>                 CHECKPATCH: ./board/esd/hh405/logo_320_240_4bpp.c
>                 CHECKPATCH: ./board/esd/hh405/logo_640_480_24bpp.c
>                 CHECKPATCH: ./board/esd/apc405/logo_640_480_24bpp.c
>                 CHECKPATCH: ./board/esd/voh405/logo_320_240_4bpp.c
>                 CHECKPATCH: ./board/esd/voh405/logo_640_480_24bpp.c
>                 CHECKPATCH: ./board/esd/hh405/fpgadata.c
>                 CHECKPATCH: ./board/esd/pci405/fpgadata.c
>                 CHECKPATCH: ./board/esd/tasreg/fpgadata.c
> 
>  drivers/mtd/nand/fsl_ifc_nand.c |    6 ++++--
>  1 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mtd/nand/fsl_ifc_nand.c
> b/drivers/mtd/nand/fsl_ifc_nand.c index b3f3c3c..3a28ab8 100644
> --- a/drivers/mtd/nand/fsl_ifc_nand.c
> +++ b/drivers/mtd/nand/fsl_ifc_nand.c
> @@ -196,7 +196,9 @@ static int is_blank(struct mtd_info *mtd, struct
> fsl_ifc_ctrl *ctrl, {
>  	struct nand_chip *chip = mtd->priv;
>  	struct fsl_ifc_mtd *priv = chip->priv;
> -	u8 __iomem *addr = priv->vbase + bufnum * (mtd->writesize * 2);
> +	int bufperpage = mtd->writesize / chip->ecc.size;
> +	u8 __iomem *addr = priv->vbase + bufnum / bufperpage
> +					* (mtd->writesize * 2);
>  	u32 __iomem *main = (u32 *)addr;
>  	u8 __iomem *oob = addr + mtd->writesize;
>  	int i;
> @@ -279,7 +281,7 @@ static int fsl_ifc_run_command(struct mtd_info *mtd)
>  		printf("%s: Write Protect Error\n", __func__);
> 
>  	if (ctrl->eccread) {
> -		int bufperpage = mtd->writesize / 512;
> +		int bufperpage = mtd->writesize / chip->ecc.size;
>  		int bufnum = (ctrl->page & priv->bufnum_mask) * bufperpage;
>  		int bufnum_end = bufnum + bufperpage - 1;