From: Maciej W. Rozycki <macro@linux-mips.org>
Date: Thu, 3 Feb 2005 23:06:29 +0000 (+0000)
Subject: Mask and ack CPU interrupts upon initialization.  Keep the state
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=925ddb04c5eee5668e7229c71580d458ed61eb9b;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

Mask and ack CPU interrupts upon initialization.  Keep the state
of software interrupts when unmasking.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/kernel/irq_cpu.c b/arch/mips/kernel/irq_cpu.c
index 2b936cf1ef7..8f8c15fa748 100644
--- a/arch/mips/kernel/irq_cpu.c
+++ b/arch/mips/kernel/irq_cpu.c
@@ -3,6 +3,8 @@
  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
  *
  * Copyright (C) 2001 Ralf Baechle
+ * Copyright (C) 2005  MIPS Technologies, Inc.  All rights reserved.
+ *      Author: Maciej W. Rozycki <macro@mips.com>
  *
  * This file define the irq handler for MIPS CPU interrupts.
  *
@@ -37,7 +39,6 @@ static int mips_cpu_irq_base;
 
 static inline void unmask_mips_irq(unsigned int irq)
 {
-	clear_c0_cause(0x100 << (irq - mips_cpu_irq_base));
 	set_c0_status(0x100 << (irq - mips_cpu_irq_base));
 }
 
@@ -107,6 +108,10 @@ void __init mips_cpu_irq_init(int irq_base)
 {
 	int i;
 
+	/* Mask interrupts. */
+	clear_c0_status(ST0_IM);
+	clear_c0_cause(CAUSEF_IP);
+
 	for (i = irq_base; i < irq_base + 8; i++) {
 		irq_desc[i].status = IRQ_DISABLED;
 		irq_desc[i].action = NULL;