[PATCH] mtd: dc21285: fix bytewise memcpy()

[Miquel Raynal]

Hello Arnd,

On 07/08/2025 at 09:20:34 +02, Arnd Bergmann <arnd at kernel.org> wrote:

> From: Arnd Bergmann <arnd at arndb.de>
>
> The commit that split up the 8/16/32-bit operations in 2004 seems to have
> broken the 8-bit case, as clang-21 now points out:
>
> drivers/mtd/maps/dc21285.c:129:97: error: parameter 'len' set but not used [-Werror,-Wunused-but-set-parameter]
>   129 | static void dc21285_copy_to_8(struct map_info *map, unsigned long to, const void *from, ssize_t len)
>
> Put back the loop that was in linux-2.6.8 and earlier for this case.
>
> Fixes: 67d4878e4e61 ("NOR flash drivers update")
> Cc: David Woodhouse <dwmw2 at infradead.org>
> Signed-off-by: Arnd Bergmann <arnd at arndb.de>

Thanks for the patch, I'll take it, but that probably means few to no
people still use it, if broken for more than 20 years...

Cheers,
Miquèl