From patchwork Thu Feb  7 09:41:38 2013
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Subject: [v2,4/4] netback: correct netbk_tx_err to handle wrap around.
Date: Wed, 06 Feb 2013 23:41:38 -0000
From: Ian Campbell <Ian.Campbell@citrix.com>
X-Patchwork-Id: 218869
Message-Id: <1360230098-28218-4-git-send-email-ian.campbell@citrix.com>
To: <netdev@vger.kernel.org>
Cc: <xen-devel@lists.xen.org>, Ian Campbell <ian.campbell@citrix.com>

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Jan Beulich <JBeulich@suse.com>
Cc: <stable@vger.kernel.org> # 3.0+

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

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index dcb2d4d..2b9520c 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -880,7 +880,7 @@ static void netbk_tx_err(struct xenvif *vif,
 
 	do {
 		make_tx_response(vif, txp, XEN_NETIF_RSP_ERROR);
-		if (cons >= end)
+		if (cons == end)
 			break;
 		txp = RING_GET_REQUEST(&vif->tx, cons++);
 	} while (1);