ARM: LPC32xx: irq.c: Clear latched event

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

Signed-off-by: Roland Stigge <stigge@antcom.de>
Cc: stable@vger.kernel.org

1 files changed, 10 insertions, 1 deletions

diff --git a/arch/arm/mach-lpc32xx/irq.c b/arch/arm/mach-lpc32xx/irq.c
index d3bf9c11fd66..c74de01ab5b6 100644
--- a/arch/arm/mach-lpc32xx/irq.c
+++ b/arch/arm/mach-lpc32xx/irq.c
@@ -309,9 +309,18 @@ 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);