tree 2c255147f33bdde95fe16d56ccda2343446d6883
parent e6cfc0295c7d51b008999a8b13a44fb43f8685ea
author James Hogan <james.hogan@imgtec.com> 1393365935 +0000
committer James Hogan <james.hogan@imgtec.com> 1393367706 +0000

irq-metag*: stop set_affinity vectoring to offline cpus

Fix irq_set_affinity callbacks in the Meta IRQ chip drivers to AND
cpu_online_mask into the cpumask when picking a CPU to vector the
interrupt to.

As Thomas pointed out, the /proc/irq/$N/smp_affinity interface doesn't
filter out offline CPUs, so without this patch if you offline CPU0 and
set an IRQ affinity to 0x3 it vectors the interrupt onto CPU0 even
though it is offline.

Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-metag@vger.kernel.org
Cc: stable@vger.kernel.org