From: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Date: Thu, 23 Jan 2014 22:38:04 +0000 (+0100)
Subject: irqchip: orion: clear bridge cause register on init
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=7b119fd1bdc59a8060df5b659b9f7a70e0169fd6;p=deliverable%2Flinux.git

irqchip: orion: clear bridge cause register on init

It is good practice to mask and clear pending irqs on init. We already
mask all irqs, so also clear the bridge irq cause register.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
---

diff --git a/drivers/irqchip/irq-orion.c b/drivers/irqchip/irq-orion.c
index e51d40031884..4137c3d15284 100644
--- a/drivers/irqchip/irq-orion.c
+++ b/drivers/irqchip/irq-orion.c
@@ -180,8 +180,9 @@ static int __init orion_bridge_irq_init(struct device_node *np,
 	gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
 	gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
 
-	/* mask all interrupts */
+	/* mask and clear all interrupts */
 	writel(0, gc->reg_base + ORION_BRIDGE_IRQ_MASK);
+	writel(0, gc->reg_base + ORION_BRIDGE_IRQ_CAUSE);
 
 	irq_set_handler_data(irq, domain);
 	irq_set_chained_handler(irq, orion_bridge_irq_handler);