From: Michael Brown <mcb30@ipxe.org>
Date: Thu, 11 Nov 2010 23:57:10 +0000 (+0000)
Subject: [forcedeth] Exit poll() as early as possible if no work to do
X-Git-Tag: v1.20.1~2436
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f122515;p=thirdparty%2Fipxe.git

[forcedeth] Exit poll() as early as possible if no work to do

Signed-off-by: Thomas Miletich <thomas.miletich@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
---

diff --git a/src/drivers/net/forcedeth.c b/src/drivers/net/forcedeth.c
index cce7cd1ec..26bbdc8d0 100644
--- a/src/drivers/net/forcedeth.c
+++ b/src/drivers/net/forcedeth.c
@@ -990,6 +990,10 @@ forcedeth_poll ( struct net_device *netdev )
 
 	status = readl ( ioaddr + NvRegIrqStatus ) & NVREG_IRQSTAT_MASK;
 
+	/* Return when no interrupts have been triggered */
+	if ( ! status )
+		return;
+
 	/* Clear interrupts */
 	writel ( NVREG_IRQSTAT_MASK, ioaddr + NvRegIrqStatus );
 
@@ -1000,10 +1004,6 @@ forcedeth_poll ( struct net_device *netdev )
 	if ( ( status & NVREG_IRQ_LINK ) || ! ( netdev_link_ok ( netdev ) ) )
 		forcedeth_link_status ( netdev );
 
-	/* Return when no interrupts have been triggered */
-	if ( ! status )
-		return;
-
 	/* Process transmitted packets */
 	nv_process_tx_packets ( netdev );