[PATCH] libata: fix HDIO_GET_32BIT ioctl

[Tejun Heo]

On Thu, Feb 11, 2016 at 02:16:27PM +0100, Arnd Bergmann wrote:
> As reported by Soohoon Lee, the HDIO_GET_32BIT ioctl does not
> work correctly in compat mode with libata.
> 
> I have investigated the issue further and found multiple problems
> that all appeared with the same commit that originally introduced
> HDIO_GET_32BIT handling in libata back in linux-2.6.8 and presumably
> also linux-2.4, as the code uses "copy_to_user(arg, &val, 1)" to copy
> a 'long' variable containing either 0 or 1 to user space.

Applied to libata/for-4.5-fixes.

Thanks a lot!

-- 
tejun