From: Roland Stigge <stigge@antcom.de>
Date: Mon, 27 Feb 2012 16:28:02 +0000 (+0100)
Subject: ARM: LPC32xx: irq.c: Clear latched event
X-Git-Tag: firefly_0821_release~7541^2~1659
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=19399c348f59bb2aa2321efe6e29ece9797717f7;p=firefly-linux-kernel-4.4.55.git

ARM: LPC32xx: irq.c: Clear latched event

commit 94ed7830cba4dce57b18a2926b5d826bfd184bd6 upstream.

This patch fixes the wakeup disable function by clearing latched events.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/arm/mach-lpc32xx/irq.c b/arch/arm/mach-lpc32xx/irq.c
index 4eae566dfdc7..965b1d6959e7 100644
--- a/arch/arm/mach-lpc32xx/irq.c
+++ b/arch/arm/mach-lpc32xx/irq.c
@@ -305,9 +305,18 @@ static int lpc32xx_irq_wake(struct irq_data *d, unsigned int state)
 
 		if (state)
 			eventreg |= lpc32xx_events[d->irq].mask;
-		else
+		else {
 			eventreg &= ~lpc32xx_events[d->irq].mask;
 
+			/*
+			 * When disabling the wakeup, clear the latched
+			 * event
+			 */
+			__raw_writel(lpc32xx_events[d->irq].mask,
+				lpc32xx_events[d->irq].
+				event_group->rawstat_reg);
+		}
+
 		__raw_writel(eventreg,
 			lpc32xx_events[d->irq].event_group->enab_reg);