linux-kernel - [PATCH 05/13] mfd: menelaus: use for_each_set

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Date:	Wed, 27 Nov 2013 13:06:49 -0600
From:	Felipe Balbi <balbi@...com>
To:	<sameo@...ux.intel.com>
CC:	<lee.jones@...aro.org>, Tony Lindgren <tony@...mide.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>, Felipe Balbi <balbi@...com>
Subject: [PATCH 05/13] mfd: menelaus: use for_each_set_bit()

that macro just helps removing some extra
line of code and hides ffs() calls.

while at that, also fix a variable shadowing
bug where 'int irq' was being redeclared inside
inner loop while it was also argument to interrupt
handler.

Signed-off-by: Felipe Balbi <balbi@...com>
---
 drivers/mfd/menelaus.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c
index 11dc4d3..9ccbb79 100644
--- a/drivers/mfd/menelaus.c
+++ b/drivers/mfd/menelaus.c
@@ -795,24 +795,22 @@ static irqreturn_t menelaus_irq(int irq, void *_menelaus)
 {
 	struct menelaus_chip *menelaus = _menelaus;
 	void (*handler)(struct menelaus_chip *menelaus);
-	unsigned isr;
+	unsigned long isr;
+	unsigned long i;
 
 	isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
 			& ~menelaus->mask2) << 8;
 	isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
 		& ~menelaus->mask1;
 
-	while (isr) {
-		int irq = fls(isr) - 1;
-		isr &= ~(1 << irq);
-
+	for_each_set_bit(i, &isr, 16) {
 		mutex_lock(&menelaus->lock);
-		menelaus_disable_irq(irq);
-		menelaus_ack_irq(irq);
-		handler = menelaus->handlers[irq];
+		menelaus_disable_irq(i);
+		menelaus_ack_irq(i);
+		handler = menelaus->handlers[i];
 		if (handler)
 			handler(menelaus);
-		menelaus_enable_irq(irq);
+		menelaus_enable_irq(i);
 		mutex_unlock(&menelaus->lock);
 	}
 
-- 
1.8.4.GIT

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