netdev - [PATCH] netback: fix multi page ring size calculation.

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Date:	Thu, 26 Jan 2012 17:20:07 +0000
From:	Wei Liu <wei.liu2@...rix.com>
To:	netdev@...r.kernel.org
CC:	jeremy@...p.org, konrad.wilk@...cle.com,
	xen-devel@...ts.xensource.com, ian.campbell@...rix.com,
	Wei Liu <wei.liu2@...rix.com>
Subject: [PATCH] netback: fix multi page ring size calculation.

---
 drivers/net/xen-netback/common.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 477e5ab..f3d95b3 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -60,9 +60,9 @@ struct xenvif_rx_meta {
 #define MAX_BUFFER_OFFSET PAGE_SIZE
 
 #define NETBK_TX_RING_SIZE(_nr_pages)					\
-	(__CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE) * (_nr_pages))
+	(__CONST_RING_SIZE(xen_netif_tx, PAGE_SIZE * (_nr_pages)))
 #define NETBK_RX_RING_SIZE(_nr_pages)					\
-	(__CONST_RING_SIZE(xen_netif_rx, PAGE_SIZE) * (_nr_pages))
+	(__CONST_RING_SIZE(xen_netif_rx, PAGE_SIZE * (_nr_pages)))
 
 #define NETBK_MAX_RING_PAGE_ORDER 2
 #define NETBK_MAX_RING_PAGES      (1U << NETBK_MAX_RING_PAGE_ORDER)
-- 
1.7.8.3

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