[U-Boot] [PATCH] dfu: dfu_sf: Take the start address into account

[Stephen Warren]

On 09/22/2015 09:50 PM, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam at freescale.com>
>
> The dfu_alt_info_spl variable allows passing a starting point
> for the binary to be flashed in the SPI NOR.
>
> For example, if we have 'dfu_alt_info_spl=spl raw 0x400', this means
> that we want to flash the binary starting at address 0x400.
>
> In order to do so we need to erase the entire sector and write to
> the the subsequent SPI NOR sectors taking such start address
> into account for the address calculations.
>
> Tested by succesfully writing SPL binary into 0x400 offset and
> the u-boot.img at offset 64 kiB of a SPL NOR.

This feels wrong. The entries in the DFU list must already be 
sector-aligned, so there's no need for the code to round them. If the 
entries are not already aligned, then the aligned erase operations will 
erase other data, which will cause corruption.