[RFC] mtd: Fix error code loss in mtdchar_read() function.

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "Miquel Raynal" <miquel.raynal at bootlin.com>
>> As pointed out by Miquel, the comment makes it clean that this behavior is
>> on purpose. If we return now all of a sudden -EBADMSG for the described
>> scenario we might even break existing MTD userspace.
> 
> The bugzilla link in the commit log [1] mentions:

Ups.
 
> * dd would just stop in the middle without showing errors
>  -> we probably don't care, we expect the userspace to know this is
>  NAND when dealing with mtd devices directly, dd is not mtd-aware
>  anyway.

Yep. That's fine.
 
> * ubiformat would loop forever
>  -> that one needs attention I guess :)

Hmm. Let me check the source.

Thanks,
//richard