* [PATCH] ARM: imx: do not return from imx_cpu_die() call
@ 2013-10-09 7:42 Shawn Guo
0 siblings, 0 replies; only message in thread
From: Shawn Guo @ 2013-10-09 7:42 UTC (permalink / raw)
To: linux-arm-kernel
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>
---
arch/arm/mach-imx/hotplug.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/hotplug.c b/arch/arm/mach-imx/hotplug.c
index 3daf1ed..b35e99c 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)
--
1.7.9.5
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2013-10-09 7:42 [PATCH] ARM: imx: do not return from imx_cpu_die() call Shawn Guo
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