1 files changed, 36 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 6f4613dd05ef..8c066d6a8e4b 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -162,6 +162,32 @@ static void crash_kexec_prepare_cpus(int cpu)
         /* Leave the IPI callback set */
 }
 
+/* wait for all the CPUs to hit real mode but timeout if they don't come in */
+static void crash_kexec_wait_realmode(int cpu)
+{
+        unsigned int msecs;
+        int i;
+
+        msecs = 10000;
+        for (i=0; i < NR_CPUS && msecs > 0; i++) {
+                if (i == cpu)
+                        continue;
+
+                while (paca[i].kexec_state < KEXEC_STATE_REAL_MODE) {
+                        barrier();
+                        if (!cpu_possible(i)) {
+                                break;
+                        }
+                        if (!cpu_online(i)) {
+                                break;
+                        }
+                        msecs--;
+                        mdelay(1);
+                }
+        }
+        mb();
+}
+
 /*
  * This function will be called by secondary cpus or by kexec cpu
  * if soft-reset is activated to stop some CPUs.
@@ -347,10 +373,12 @@ int crash_shutdown_unregister(crash_shutdown_t handler)
 EXPORT_SYMBOL(crash_shutdown_unregister);
 
 static unsigned long crash_shutdown_buf[JMP_BUF_LEN];
+static int crash_shutdown_cpu = -1;
 
 static int handle_fault(struct pt_regs *regs)
 {
-        longjmp(crash_shutdown_buf, 1);
+        if (crash_shutdown_cpu == smp_processor_id())
+                longjmp(crash_shutdown_buf, 1);
         return 0;
 }
 
@@ -375,11 +403,14 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
         for_each_irq(i) {
                 struct irq_desc *desc = irq_to_desc(i);
 
+                if (!desc || !desc->chip || !desc->chip->eoi)
+                        continue;
+
                 if (desc->status & IRQ_INPROGRESS)
                         desc->chip->eoi(i);
 
                 if (!(desc->status & IRQ_DISABLED))
-                        desc->chip->disable(i);
+                        desc->chip->shutdown(i);
         }
 
         /*
@@ -388,6 +419,7 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
          */
         old_handler = __debugger_fault_handler;
         __debugger_fault_handler = handle_fault;
+        crash_shutdown_cpu = smp_processor_id();
         for (i = 0; crash_shutdown_handles[i]; i++) {
                 if (setjmp(crash_shutdown_buf) == 0) {
                         /*
@@ -401,6 +433,7 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
                         asm volatile("sync; isync");
                 }
         }
+        crash_shutdown_cpu = -1;
         __debugger_fault_handler = old_handler;
 
         /*
@@ -412,6 +445,7 @@ void default_machine_crash_shutdown(struct pt_regs *regs)
         crash_kexec_prepare_cpus(crashing_cpu);
         cpu_set(crashing_cpu, cpus_in_crash);
         crash_kexec_stop_spus();
+        crash_kexec_wait_realmode(crashing_cpu);
         if (ppc_md.kexec_cpu_down)
                 ppc_md.kexec_cpu_down(1, 0);
 }