net: ipa: use autosuspend

Use runtime power management autosuspend.

Up until this point, we only suspended the IPA hardware for system
suspend; now we'll suspend it aggressively using runtime power
management, setting the initial autosuspend delay to half a second
of inactivity.

Replace pm_runtime_put() calls with pm_runtime_put_autosuspend(),
call pm_runtime_mark_last_busy() before each of those.  In places
where we're shutting things down, or decrementing power references
for errors, use pm_runtime_put_noidle() instead.

Finally, remove ipa_runtime_idle(), so the ->runtime_suspend
callback will occur if idle.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index 3fecaadb4a37..b35170a93b0f 100644
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c
@@ -116,7 +116,8 @@ static irqreturn_t ipa_isr_thread(int irq, void *dev_id)
 		iowrite32(pending, ipa->reg_virt + offset);
 	}
 out_power_put:
-	(void)pm_runtime_put(dev);
+	pm_runtime_mark_last_busy(dev);
+	(void)pm_runtime_put_autosuspend(dev);
 
 	return IRQ_HANDLED;
 }