MIPS: oprofile: Only do performance counter handling for counter interrupts
In Loongson2f IP6 is shared by bonito and perfcounters so we need to avoid
do_IRQ for perfcounter when the interrupt is from bonito.
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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 @@
*/
/* 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;