powerpc/eeh: atomic_dec_if_positive() to update passthru count

[Michael Ellerman]

On Thu, 2015-27-08 at 05:58:27 UTC, Gavin Shan wrote:
> No need to have two atomic opertions (update and fetch/check) when
> decreasing PE's number of passed devices as one atomic operation
> is enough.
> 
> Signed-off-by: Gavin Shan <gwshan at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/54f9a64a36e4fc041721a954

cheers