From 965d488202829699dd9d089adb4c8b605e9de6cd Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Tue, 15 Nov 2011 15:56:06 +0100
Subject: [PATCH 17/70] NET: MIPS: lantiq: return value of request_irq was not
 handled gracefully

The return values of request_irq() were not checked leading to the following
error message.

drivers/net/ethernet/lantiq_etop.c: In function 'ltq_etop_hw_init':
drivers/net/ethernet/lantiq_etop.c:368:15: warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result
drivers/net/ethernet/lantiq_etop.c:377:15: warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result

Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: netdev@vger.kernel.org
---
 drivers/net/ethernet/lantiq_etop.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -313,6 +313,7 @@ ltq_etop_hw_init(struct net_device *dev)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
 	unsigned int mii_mode = priv->pldata->mii_mode;
+	int err = 0;
 	int i;
 
 	ltq_pmu_enable(PMU_PPE);
@@ -357,7 +358,7 @@ ltq_etop_hw_init(struct net_device *dev)
 
 	ltq_dma_init_port(DMA_PORT_ETOP);
 
-	for (i = 0; i < MAX_DMA_CHAN; i++) {
+	for (i = 0; i < MAX_DMA_CHAN && !err; i++) {
 		int irq = LTQ_DMA_ETOP + i;
 		struct ltq_etop_chan *ch = &priv->ch[i];
 
@@ -365,21 +366,22 @@ ltq_etop_hw_init(struct net_device *dev)
 
 		if (IS_TX(i)) {
 			ltq_dma_alloc_tx(&ch->dma);
-			request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
+			err = request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
 				"etop_tx", priv);
 		} else if (IS_RX(i)) {
 			ltq_dma_alloc_rx(&ch->dma);
 			for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM;
 					ch->dma.desc++)
 				if (ltq_etop_alloc_skb(ch))
-					return -ENOMEM;
+					err = -ENOMEM;
 			ch->dma.desc = 0;
-			request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
+			err = request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
 				"etop_rx", priv);
 		}
-		ch->dma.irq = irq;
+		if (!err)
+			ch->dma.irq = irq;
 	}
-	return 0;
+	return err;
 }
 
 static void
