sparc64: Fix NMI programming when perf events are active.

If perf events are active, we should not reset the %pcr to
PCR_PIC_PRIV.  That perf events code does the management.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
index f30f4a1ead2..d242a734054 100644
--- a/arch/sparc/kernel/nmi.c
+++ b/arch/sparc/kernel/nmi.c
@@ -96,7 +96,6 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
         int cpu = smp_processor_id();
 
         clear_softint(1 << irq);
-        pcr_ops->write(PCR_PIC_PRIV);
 
         local_cpu_data().__nmi_count++;
 
@@ -105,6 +104,8 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
         if (notify_die(DIE_NMI, "nmi", regs, 0,
                        pt_regs_trap_type(regs), SIGINT) == NOTIFY_STOP)
                 touched = 1;
+        else
+                pcr_ops->write(PCR_PIC_PRIV);
 
         sum = kstat_irqs_cpu(0, cpu);
         if (__get_cpu_var(nmi_touch)) {