tree 1e2e5df84aa1ab4282db37c4fa653fb04e506756
parent 2e1a2556ebbbe7b53a05b721ac0d3d8ca9873cdb
author Gavin Shan <gwshan@linux.vnet.ibm.com> 1440655107 +1000
committer Michael Ellerman <mpe@ellerman.id.au> 1444901518 +1100

powerpc/eeh: atomic_dec_if_positive() to update passthru count

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@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>