From: Jesse Brandeburg <jesse.brandeburg@intel.com>
Date: Fri, 12 Sep 2008 02:56:14 +0000 (-0700)
Subject: ixgbe: fix bug with shared interrupts
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=f47cf66e9cc778d21533c681e89b4034ed2d8666;p=openwrt%2Fstaging%2Fblogic.git

ixgbe: fix bug with shared interrupts

fix ixgbe bug reported with shared legacy interrupts

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 11bf86b93622..cfaa3ca28f51 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -1245,8 +1245,13 @@ static irqreturn_t ixgbe_intr(int irq, void *data)
 	/* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
 	 * therefore no explict interrupt disable is necessary */
 	eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
-	if (!eicr)
+	if (!eicr) {
+		/* shared interrupt alert!
+		 * make sure interrupts are enabled because the read will
+		 * have disabled interrupts due to EIAM */
+		ixgbe_irq_enable(adapter);
 		return IRQ_NONE;	/* Not our interrupt */
+	}
 
 	if (eicr & IXGBE_EICR_LSC)
 		ixgbe_check_lsc(adapter);