ARM: imx: do not return from imx_cpu_die() call

When imx_cpu_die() is being called, the cpu should never return from the
call but just in WFI and wait for hardware to take it down.  So let's
do cpu_do_idle() repeatly in the call.  Doing this help improve the
relibility of hotplug operation.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/arm/mach-imx/hotplug.c b/arch/arm/mach-imx/hotplug.c
index 3daf1ed90579..b35e99cc5e5b 100644
--- a/arch/arm/mach-imx/hotplug.c
+++ b/arch/arm/mach-imx/hotplug.c
@@ -52,7 +52,9 @@ void imx_cpu_die(unsigned int cpu)
          * the register being cleared to kill the cpu.
          */
         imx_set_cpu_arg(cpu, ~0);
-        cpu_do_idle();
+
+        while (1)
+                cpu_do_idle();
 }
 
 int imx_cpu_kill(unsigned int cpu)