3.5.7.6 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Ian Campbell <ian.campb...@citrix.com>
commit 4cc7c1cb7b11b6f3515bd9075527576a1eecc4aa upstream.
Signed-off-by: Ian Campbell <ian.campb...@citrix.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesin...@canonical.com>
---
drivers/net/xen-netback/netback.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/net/xen-netback/netback.c
b/drivers/net/xen-netback/netback.c
index e7913e0..c503a58 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -949,7 +949,7 @@ static struct gnttab_copy *xen_netbk_get_requests(struct
xen_netbk *netbk,
pending_idx = netbk->pending_ring[index];
page = xen_netbk_alloc_page(netbk, skb, pending_idx);
if (!page)
- return NULL;
+ goto err;
gop->source.u.ref = txp->gref;
gop->source.domid = vif->domid;
@@ -971,6 +971,17 @@ static struct gnttab_copy *xen_netbk_get_requests(struct
xen_netbk *netbk,
}
return gop;
+err:
+ /* Unwind, freeing all pages and sending error responses. */
+ while (i-- > start) {
+ xen_netbk_idx_release(netbk, frag_get_pending_idx(&frags[i]),
+ XEN_NETIF_RSP_ERROR);
+ }
+ /* The head too, if necessary. */
+ if (start)
+ xen_netbk_idx_release(netbk, pending_idx, XEN_NETIF_RSP_ERROR);
+
+ return NULL;
}
static int xen_netbk_tx_check_gop(struct xen_netbk *netbk,
--
1.7.9.5
--
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