From: Huang, Tao <huangtao@rock-chips.com>
Date: Fri, 26 Aug 2016 11:19:04 +0000 (+0800)
Subject: HACK: lib/kobject_uevent.c: ignore thermal uevent when suspend
X-Git-Tag: firefly_0821_release~1653
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=58f443ef96965f083dda689adafa404bd321877c;p=firefly-linux-kernel-4.4.55.git

HACK: lib/kobject_uevent.c: ignore thermal uevent when suspend

Android healthd try to listen power_supply subsystem uevent,
but which will block system from suspend on big.LITTLE system
because thermal_cooling_device_unregister will called when
cpufreq_exit. So ignore this uevent when suspend.

Change-Id: I35948498916560d5ec75fe561c9e9d588663ad22
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
---

diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index f6c2c1e7779c..586f2f57fbfc 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -223,6 +223,21 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
 		return 0;
 	}
 
+	if (IS_ENABLED(CONFIG_ARCH_ROCKCHIP) &&
+	    IS_ENABLED(CONFIG_FREEZER) &&
+	    IS_ENABLED(CONFIG_ANDROID)) {
+		/*
+		 * Android healthd try to listen power_supply subsystem uevent,
+		 * but which will block system from suspend on big.LITTLE system
+		 * because thermal_cooling_device_unregister will called when
+		 * cpufreq_exit. So ignore this uevent when suspend.
+		 */
+		extern bool pm_freezing;
+
+		if (pm_freezing && !strcmp(subsystem, "thermal"))
+			return 0;
+	}
+
 	/* environment buffer */
 	env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL);
 	if (!env)