benet: fix return value check in be_lancer_xmit_workarounds()

BugLink: https://bugs.launchpad.net/bugs/2037005
[ Upstream commit 5c85f7065718a949902b238a6abd8fc907c5d3e0 ]

in be_lancer_xmit_workarounds(), it should go to label 'tx_drop'
if an unexpected value is returned by pskb_trim().

Fixes: 93040ae5cc8d ("be2net: Fix to trim skb for padded vlan packets to workaround an ASIC Bug")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Link: https://lore.kernel.org/r/20230725032726.15002-1-ruc_gongyuanjun@163.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 7236c4f70cf51c32c9820d38811b9ccd04812745..52d6d43e7bfea7507a07d20f0bea260be69e4c2b 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -1139,7 +1139,8 @@ static struct sk_buff *be_lancer_xmit_workarounds(struct be_adapter *adapter,
            (lancer_chip(adapter) || BE3_chip(adapter) ||
             skb_vlan_tag_present(skb)) && is_ipv4_pkt(skb)) {
                ip = (struct iphdr *)ip_hdr(skb);
-               pskb_trim(skb, eth_hdr_len + ntohs(ip->tot_len));
+               if (unlikely(pskb_trim(skb, eth_hdr_len + ntohs(ip->tot_len))))
+                       goto tx_drop;
        }
 
        /* If vlan tag is already inlined in the packet, skip HW VLAN