xen/netback: fix build warning

[ Upstream commit 7dfa764e0223a324366a2a1fc056d4d9d4e95491 ]

Commit ad7f402ae4f4 ("xen/netback: Ensure protocol headers don't fall in
the non-linear area") introduced a (valid) build warning. There have
even been reports of this problem breaking networking of Xen guests.

Fixes: ad7f402ae4f4 ("xen/netback: Ensure protocol headers don't fall in the non-linear area")
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Tested-by: Jason Andryuk <jandryuk@gmail.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 6bd7b62..26428db 100644 (file)
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -530,7 +530,7 @@ static int xenvif_tx_check_gop(struct xenvif_queue *queue,
        const bool sharedslot = nr_frags &&
                                frag_get_pending_idx(&shinfo->frags[0]) ==
                                    copy_pending_idx(skb, copy_count(skb) - 1);
-       int i, err;
+       int i, err = 0;
 
        for (i = 0; i < copy_count(skb); i++) {
                int newerr;