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

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Submitter Shawn Guo
Date Oct. 9, 2013, 7:42 a.m.
Message ID <1381304562-22852-1-git-send-email-shawn.guo@linaro.org>
Download mbox | patch
Permalink /patch/281733/
State New
Headers show

Comments

Shawn Guo - Oct. 9, 2013, 7:42 a.m.
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(-)

Patch

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)