From: Sai Charan Gurrappadi <sgurrappadi@nvidia.com>
Date: Wed, 25 Jul 2012 15:41:53 +0000 (-0700)
Subject: cpuquiet: Add notifiers for the runnables governor
X-Git-Tag: firefly_0821_release~4158^2~40
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=14d64ba7d1f7a845f48dc7e175c49a03ffbf3be8;p=firefly-linux-kernel-4.4.55.git

cpuquiet: Add notifiers for the runnables governor

The governor stops sampling whenever the device is busy and starts its
sampling loop when the device is free.

Change-Id: Ifdae4a84e56c2734be48e49f6112b537602a02da
Signed-off-by: Sai Charan Gurrappadi <sgurrappadi@nvidia.com>
Reviewed-on: http://git-master/r/124680
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>
---

diff --git a/drivers/cpuquiet/governors/runnable_threads.c b/drivers/cpuquiet/governors/runnable_threads.c
index a44abe9b25f2..44cf308befcf 100644
--- a/drivers/cpuquiet/governors/runnable_threads.c
+++ b/drivers/cpuquiet/governors/runnable_threads.c
@@ -186,6 +186,22 @@ static int runnables_sysfs(void)
 	return err;
 }
 
+static void runnables_device_busy(void)
+{
+	if (runnables_state != DISABLED) {
+		runnables_state = DISABLED;
+		cancel_delayed_work_sync(&runnables_work);
+	}
+}
+
+static void runnables_device_free(void)
+{
+	if (runnables_state == DISABLED) {
+		runnables_state = IDLE;
+		runnables_work_func(NULL);
+	}
+}
+
 static void runnables_stop(void)
 {
 	runnables_state = DISABLED;
@@ -228,6 +244,8 @@ static int runnables_start(void)
 struct cpuquiet_governor runnables_governor = {
 	.name		   	  = "runnable",
 	.start			  = runnables_start,
+	.device_free_notification = runnables_device_free,
+	.device_busy_notification = runnables_device_busy,
 	.stop			  = runnables_stop,
 	.owner		   	  = THIS_MODULE,
 };