From: Ian Campbell <Ian.Campbell@citrix.com>
Date: Wed, 6 Feb 2013 23:41:38 +0000 (+0000)
Subject: netback: correct netbk_tx_err to handle wrap around.
X-Git-Tag: firefly_0821_release~7541^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7406f4230c4d086793cc62fa657750abf98559d6;p=firefly-linux-kernel-4.4.55.git

netback: correct netbk_tx_err to handle wrap around.

[ Upstream commit b9149729ebdcfce63f853aa54a404c6a8f6ebbf3 ]

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Jan Beulich <JBeulich@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 40e8a33c28cd..9068d32d2d5c 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -839,7 +839,7 @@ 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);