[AVR32] extint: change set_irq_type() handling

Update the AVR32 EIC code to use the new __set_irq_handler_unlocked()
call, getting rid of one more instance of this widespread problem.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

arch/avr32/mach-at32ap/extint.c

@@ -130,8 +130,11 @@ static int eic_set_irq_type(unsigned int irq, unsigned int flow_type)
 		eic_writel(eic, EDGE, edge);
 		eic_writel(eic, LEVEL, level);
 
-		if (flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
+		if (flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) {
 			flow_type |= IRQ_LEVEL;
+			__set_irq_handler_unlocked(irq, handle_level_irq);
+		} else
+			__set_irq_handler_unlocked(irq, handle_edge_irq);
 		desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
 		desc->status |= flow_type;
 	}
@@ -151,9 +154,8 @@ static struct irq_chip eic_chip = {
 static void demux_eic_irq(unsigned int irq, struct irq_desc *desc)
 {
 	struct eic *eic = desc->handler_data;
-	struct irq_desc *ext_desc;
 	unsigned long status, pending;
-	unsigned int i, ext_irq;
+	unsigned int i;
 
 	status = eic_readl(eic, ISR);
 	pending = status & eic_readl(eic, IMR);
@@ -162,12 +164,7 @@ static void demux_eic_irq(unsigned int irq, struct irq_desc *desc)
 		i = fls(pending) - 1;
 		pending &= ~(1 << i);
 
-		ext_irq = i + eic->first_irq;
-		ext_desc = irq_desc + ext_irq;
-		if (ext_desc->status & IRQ_LEVEL)
-			handle_level_irq(ext_irq, ext_desc);
-		else
-			handle_edge_irq(ext_irq, ext_desc);
+		generic_handle_irq(i + eic->first_irq);
 	}
 }
 
@@ -236,9 +233,8 @@ static int __init eic_probe(struct platform_device *pdev)
 	eic->chip = &eic_chip;
 
 	for (i = 0; i < nr_irqs; i++) {
-		/* NOTE the handler we set here is ignored by the demux */
 		set_irq_chip_and_handler(eic->first_irq + i, &eic_chip,
-					 handle_level_irq);
+					 handle_edge_irq);
 		set_irq_chip_data(eic->first_irq + i, eic);
 	}