[PATCH 07/16] ARM: bL_platsmp.c: close the kernel entry gate before hot-unplugging a CPU

[Nicolas Pitre]

If for whatever reason a CPU is unexpectedly awaken, it shouldn't
re-enter the kernel by using whatever entry vector that might have
been set by a previous operation.

Signed-off-by: Nicolas Pitre <nico at linaro.org>
---
 arch/arm/common/bL_platsmp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/common/bL_platsmp.c b/arch/arm/common/bL_platsmp.c
index 0acb9f4685..0ae44123bf 100644
--- a/arch/arm/common/bL_platsmp.c
+++ b/arch/arm/common/bL_platsmp.c
@@ -63,6 +63,11 @@ static int bL_cpu_disable(unsigned int cpu)
 
 static void __ref bL_cpu_die(unsigned int cpu)
 {
+	unsigned int mpidr, pcpu, pcluster;
+	asm ("mrc p15, 0, %0, c0, c0, 5" : "=r" (mpidr));
+	pcpu = mpidr & 0xff;
+	pcluster = (mpidr >> 8) & 0xff;
+	bL_set_entry_vector(pcpu, pcluster, NULL);
 	bL_cpu_power_down();
 }
 
-- 
1.8.0