Commit-ID: f47ab81aca8264adae25005f0130db60c0af7797
Gitweb: http://git.kernel.org/tip/f47ab81aca8264adae25005f0130db60c0af7797
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Sat, 19 Mar 2016 11:47:39 +0100
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Sat, 19 Mar 2016 13:40:08 +0100
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@xxxxxxxxxxxxx>
Cc: Dimitri Sivanich <sivanich@xxxxxxx>
---
arch/x86/kernel/apic/x2apic_uv_x.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
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 @@ static int uv_scir_cpu_notify(struct notifier_block *self, unsigned long action,
{
long cpu = (long)hcpu;
- switch (action) {
+ switch (action & ~CPU_TASKS_FROZEN) {
+ case CPU_DOWN_FAILED:
case CPU_ONLINE:
uv_heartbeat_enable(cpu);
break;
--
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