Re: [PATCH 1/3] MTD: m25p80: fix write return value.

[Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>]

On Thursday, April 30, 2015 at 03:33:47 PM, Michal Suchanek wrote:
> The size of written data was added to user supplied value rather than
> written at the provided address.

You might want to work on the commit message a little, something like
the following, but feel free to reword as seen fit.

The 'retlen' points to a variable representing the number of data bytes 
written/read (see include/linux/mtd/mtd.h) by the current invocation of
the function. This variable must be set, not incremented.

Otherwise, the patch is correct I believe:

Acked-by: Marek Vasut <marex-ynQEQJNshbs@public.gmane.org>

> Signed-off-by: Michal Suchanek <hramrach-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/mtd/devices/m25p80.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
> index 7c8b169..0b2bc21 100644
> --- a/drivers/mtd/devices/m25p80.c
> +++ b/drivers/mtd/devices/m25p80.c
> @@ -102,7 +102,7 @@ static void m25p80_write(struct spi_nor *nor, loff_t
> to, size_t len,
> 
>  	spi_sync(spi, &m);
> 
> -	*retlen += m.actual_length - cmd_sz;
> +	*retlen = m.actual_length - cmd_sz;
>  }
> 
>  static inline unsigned int m25p80_rx_nbits(struct spi_nor *nor)

Best regards,
Marek Vasut