There is no need to acquire ata_host::lock spinlock from
hardware context single IRQ interrupt handler since the
handler does not access host data that could be altered
by concurrent processors.
Signed-off-by: NAlexander Gordeev <agordeev@redhat.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org