linux-kernel - [PATCH v3 4/8] net/fec: don't request invalid IRQ

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Message-Id: <6d1e5cdcbfc48df864ec9e0939645c0e95389d2a.1323326019.git.LW@KARO-electronics.de>
Date:	Thu,  8 Dec 2011 08:59:28 +0100
From:	Lothar Waßmann <LW@...O-electronics.de>
To:	netdev@...r.kernel.org
Cc:	David Miller <davem@...emloft.net>, linux-kernel@...r.kernel.org,
	Shawn Guo <shawn.guo@...aro.org>,
	Lothar Waßmann <LW@...O-electronics.de>
Subject: [PATCH v3 4/8] net/fec: don't request invalid IRQ

prevent calling request_irq() with a known invalid IRQ number and
preserve the return value of the platform_get_irq() function

Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
Acked-by: Shawn Guo <shawn.guo@...aro.org>
---
 drivers/net/ethernet/freescale/fec.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 7ef408f..e2b5ce6 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -1575,8 +1575,12 @@ fec_probe(struct platform_device *pdev)
 
 	for (i = 0; i < FEC_IRQ_NUM; i++) {
 		irq = platform_get_irq(pdev, i);
-		if (i && irq < 0)
-			break;
+		if (irq < 0) {
+			if (i)
+				break;
+			ret = irq;
+			goto failed_irq;
+		}
 		ret = request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev);
 		if (ret) {
 			while (--i >= 0) {
-- 
1.5.6.5

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