[Xen-devel] [PATCH 3.15 078/109] xen-netback: Fix pointer incrementation to avoid incorrect logging

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

3.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zoltan Kiss <zoltan.kiss@xxxxxxxxxx>

[ Upstream commit d8cfbfc4660054150ca1b7c501a8edc0771022f9 ]

Due to this pointer is increased prematurely, the error log contains rubbish.

Signed-off-by: Zoltan Kiss <zoltan.kiss@xxxxxxxxxx>
Reported-by: Armin Zentai <armin.zentai@xxxxxxx>
Cc: netdev@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/xen-netback/netback.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1022,7 +1022,6 @@ static int xenvif_tx_check_gop(struct xe
 
        /* Check status of header. */
        err = (*gopp_copy)->status;
-       (*gopp_copy)++;
        if (unlikely(err)) {
                if (net_ratelimit())
                        netdev_dbg(vif->dev,
@@ -1035,6 +1034,7 @@ static int xenvif_tx_check_gop(struct xe
                        xenvif_idx_release(vif, pending_idx,
                                           XEN_NETIF_RSP_ERROR);
        }
+       (*gopp_copy)++;
 
 check_frags:
        for (i = 0; i < nr_frags; i++, gop_map++) {



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