On Wed, Feb 07, 2018 at 06:36:48PM -0800, Derek Basehore wrote:

This adds functionality to resend the MAPC command to an ITS node on
resume. If the ITS is powered down during suspend and the collections
are not backed by memory, the ITS will lose that state. This just sets
up the known state for the collections after the ITS is restored.

This is enabled via the reset-on-suspend flag in the DTS. It only runs
for collections stored in the ITS itself.

Signed-off-by: Derek Basehore <redacted>
---
 drivers/irqchip/irq-gic-v3-its.c   | 86 +++++++++++++++++++++-----------------
 include/linux/irqchip/arm-gic-v3.h |  1 +
 2 files changed, 49 insertions(+), 38 deletions(-)

For the very little it's worth:

Reviewed-by: Brian Norris <briannorris@chromium.org>