On 19:28 Wed 05 Dec , Sascha Hauer wrote:
> On Wed, Dec 05, 2012 at 06:15:20PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > via cdev we may write unaligned data the code was drop in the commit
> > 0a4b1c7e440a81819eb2137f923573a3055dc7a2
> > mtd core: call driver write function with complete buffer
> >
> > which is true for spi flashes but the code is still mandatory on nand
>
> I suggest the following simpler approach.
>
> Sascha
>
yes it work here
Best Regards,
J.
>
> From 5248abe7e59f60085b9a2affd3db11a6ac0a9da9 Mon Sep 17 00:00:00 2001
> From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> Date: Wed, 5 Dec 2012 19:24:41 +0100
> Subject: [PATCH] mtd nand: allow partial page writes
>
> The nand layer handles partial page writes just fine. If the start or
> end of the data is not page aligned, the nand layer will copy the data
> to a temporary page buffer.
> Remove the check which disallows partial page writes since this is what
> we want to do on barebox when for example an image is written to nand
> which is not padded to page size.
>
> Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> ---
> drivers/mtd/nand/nand_write.c | 7 -------
> 1 file changed, 7 deletions(-)
>
> diff --git a/drivers/mtd/nand/nand_write.c b/drivers/mtd/nand/nand_write.c
> index 5ed04ce..9997127 100644
> --- a/drivers/mtd/nand/nand_write.c
> +++ b/drivers/mtd/nand/nand_write.c
> @@ -273,13 +273,6 @@ int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
> if (!writelen)
> return 0;
>
> - /* reject writes, which are not page aligned */
> - if (NOTALIGNED(to) || NOTALIGNED(ops->len)) {
> - printk(KERN_NOTICE "nand_write: "
> - "Attempt to write not page aligned data\n");
> - return -EINVAL;
> - }
> -
> column = to & (mtd->writesize - 1);
> subpage = column || (writelen & (mtd->writesize - 1));
>
> --
> 1.7.10.4
>
> --
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