[PATCH -queue 2/2] [loongson] oprofile: avoid do_IRQ for perfcounter when the interrupt is from bonito

[Wu Zhangjin <wuzhangjin@gmail.com>]

In loongson2f, the IP6 is shared by bonito and perfcounter, we need to
avoid do_IRQ for perfcounter when the interrupt is from bonito. This
patch does it.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
---
 arch/mips/oprofile/op_model_loongson2.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/mips/oprofile/op_model_loongson2.c 
b/arch/mips/oprofile/op_model_loongson2.c
index 575cd14..475ff46 100644
--- a/arch/mips/oprofile/op_model_loongson2.c
+++ b/arch/mips/oprofile/op_model_loongson2.c
@@ -1,7 +1,7 @@
 /*
  * Loongson2 performance counter driver for oprofile
  *
- * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Copyright (C) 2009 Lemote Inc.
  * Author: Yanhua <yanh@lemote.com>
  * Author: Wu Zhangjin <wuzj@lemote.com>
  *
@@ -125,6 +125,9 @@ static irqreturn_t loongson2_perfcount_handler(int irq, 
void *dev_id)
         */
 
        /* Check whether the irq belongs to me */
+       enabled = read_c0_perfcnt() & LOONGSON2_PERFCNT_INT_EN;
+       if (!enabled)
+               return IRQ_NONE;
        enabled = reg.cnt1_enabled | reg.cnt2_enabled;
        if (!enabled)
                return IRQ_NONE;
-- 
1.6.2.1