netdev - [PATCH] e1000e: Fix irq_synchronize in MSI-X case

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Message-Id: <201007201712.05671.jdelvare@suse.de>
Date:	Tue, 20 Jul 2010 17:12:05 +0200
From:	Jean Delvare <jdelvare@...e.de>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, Bruce Allan <bruce.w.allan@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: [PATCH] e1000e: Fix irq_synchronize in MSI-X case

Synchronize all IRQs when in MSI-X IRQ mode.

Signed-off-by: Jean Delvare <jdelvare@...e.de>
Cc: Bruce Allan <bruce.w.allan@...el.com>
Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>
---
I sent this patch to the e1000-devel list on June 8th, 2010, but
didn't receive any answer:
http://sourceforge.net/mailarchive/forum.php?thread_name=201006081818.59098.jdelvare%40suse.de&forum_name=e1000-devel

I don't know how critical synchronize_irq() is, so I don't know if
this patch should go to stable branches or not.

 drivers/net/e1000e/netdev.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -1939,7 +1939,13 @@ static void e1000_irq_disable(struct e10
 	if (adapter->msix_entries)
 		ew32(EIAC_82574, 0);
 	e1e_flush();
-	synchronize_irq(adapter->pdev->irq);
+
+	if (adapter->msix_entries) {
+		synchronize_irq(adapter->msix_entries[0].vector);
+		synchronize_irq(adapter->msix_entries[1].vector);
+		synchronize_irq(adapter->msix_entries[2].vector);
+	} else
+		synchronize_irq(adapter->pdev->irq);
 }
 
 /**

-- 
Jean Delvare
Suse L3
--
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