Missing ioctl32 for ubi

[Geert Uytterhoeven]

	Hi Артём,

On Wed, 14 Jan 2009, Artem Bityutskiy wrote:
> On Wed, 2009-01-14 at 14:48 +0100, Geert Uytterhoeven wrote:
> > When running ubimkvol (32-bit userland) on a PS3 (ppc64), I get:
> > 
> > | # ubimkvol /dev/ubi0 -N test -s 200MiB
> > | ubimkvol: error!: cannot UBI create volume
> > |           error 22 (Invalid argument)
> > | #
> > 
> > and in the kernel log:
> > 
> > | ioctl32(ubimkvol:2207): Unknown cmd fd(3) cmd(80986f00){t:'o';sz:152} arg(ff88a888) on /dev/ubi0
> > 
> > This is on 2.6.29-rc1+.
> 
> Hmm, frankly I have no idea what this could be. I'll look and try ti
> figure out, though.

When running 32-bit userland on a 64-bit kernel, ioctls have to be translated.

I noticed the drivers/mtd/ubi/cdev.c:ubi_*cdev_operations structures don't have
.compat_ioctl entries, which would handle those translations.

With kind regards,

Geert Uytterhoeven
Software Architect

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