x86/apic/uv: Fix the hotplug notifier
The notifier is missing the CPU_DOWN_FAILED transition. That leaves the
heartbeat disabled when CPU_DOWN_PREPARE fails.
It also does not handle the FROZEN transition variants. That might not be an
issue for UV, but it's inconsistent.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dimitri Sivanich <sivanich@sgi.com>
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 2780703..8f4942e 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -792,7 +792,8 @@
{
long cpu = (long)hcpu;
- switch (action) {
+ switch (action & ~CPU_TASKS_FROZEN) {
+ case CPU_DOWN_FAILED:
case CPU_ONLINE:
uv_heartbeat_enable(cpu);
break;