[PATCH] kdump x86_64 nmi event notification fix

After a crash we should wait for NMI IPI event and not for external NMI or
NMI watchdog tick.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>

diff --git a/arch/x86_64/kernel/crash.c b/arch/x86_64/kernel/crash.c
index 44c8af65325e44ffe9d0831c5df3681eeac374a9..fc57a139123e348c4adc84fa37475a4e7ca059c4 100644 (file)
--- a/arch/x86_64/kernel/crash.c
+++ b/arch/x86_64/kernel/crash.c
@@ -102,7 +102,7 @@ static int crash_nmi_callback(struct notifier_block *self,
        struct pt_regs *regs;
        int cpu;
 
-       if (val != DIE_NMI)
+       if (val != DIE_NMI_IPI)
                return NOTIFY_OK;
 
        regs = ((struct die_args *)data)->regs;
@@ -114,7 +114,7 @@ static int crash_nmi_callback(struct notifier_block *self,
         * an NMI if system was initially booted with nmi_watchdog parameter.
         */
        if (cpu == crashing_cpu)
-               return 1;
+               return NOTIFY_STOP;
        local_irq_disable();
 
        crash_save_this_cpu(regs, cpu);