MTD: How to get actual image size from MTD partition

[Ezequiel Garcia]

On Thu, 29 Jul 2021 at 08:45, Richard Weinberger <richard at nod.at> wrote:
>
> Ezequiel,
>
> ----- Ursprüngliche Mail -----
> > [snip]
> >
> > Ouch, so surprised that after all these years someone is doing squashfs/mtdblock
> > instead of using ubiblock :-)
> >
> > Can we patch either Kconfig or add some warn_once on mtdblock
> > usage, suggesting to use ubiblock instead?
>
> a hint in Kconfig makes IMHO sense. Do you want to send a patch?
> A warning is too much since on some tiny embedded system with NOR flash mtdblock is still
> a good choice.
> ubiblock is mostly useful for NAND flash.
>
> > I remember there was still some use case(s) for mtdblock but I can't remember
> > now what was it, perhaps we should document the expectations?
> > (Is that for JFFS2 to mount?)
>
> a long time ago mount didn't accept character devices, so you had to pass mtdblockX to mount
> JFFS2.
> This limitation is gone.
>

OK, let me try to cook a patch for you.

Eze