From: 黄涛 <huangtao@rock-chips.com>
Date: Tue, 6 Mar 2012 06:19:27 +0000 (+0800)
Subject: rk30: cpu hotplug: better cpu die
X-Git-Tag: firefly_0821_release~9595^2~90
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=58d7488f6cd0088fdf27a8967dfaad0804fc4433;p=firefly-linux-kernel-4.4.55.git

rk30: cpu hotplug: better cpu die
---

diff --git a/arch/arm/mach-rk30/hotplug.c b/arch/arm/mach-rk30/hotplug.c
index 5ea1ae3d48fe..159269149cb4 100644
--- a/arch/arm/mach-rk30/hotplug.c
+++ b/arch/arm/mach-rk30/hotplug.c
@@ -60,8 +60,10 @@ void platform_cpu_die(unsigned int cpu)
 	/* wait for SoC code in platform_cpu_kill() to shut off CPU core
 	 * power. CPU bring up starts from the reset vector.
 	 */
-	while (1)
-		cpu_do_idle();
+	while (1) {
+		dsb();
+		wfi();
+	}
 }
 
 int platform_cpu_disable(unsigned int cpu)