The RCU read lock is grabbed first thing in sunvnet_start_xmit_common()
so it always needs to be released. This removes the conditional release
in the dropped packet error path and removes a couple of superfluous
calls in the middle of the code.
Reported-by: Bijan Mottahedeh <bijan.mottahe...@oracle.com>
Signed-off-by: Shannon Nelson <shannon.nel...@oracle.com>
---
drivers/net/ethernet/sun/sunvnet_common.c | 8 ++------
1 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/sun/sunvnet_common.c
b/drivers/net/ethernet/sun/sunvnet_common.c
index d2aed2c..9384db0 100644
--- a/drivers/net/ethernet/sun/sunvnet_common.c
+++ b/drivers/net/ethernet/sun/sunvnet_common.c
@@ -1279,10 +1279,8 @@ int sunvnet_start_xmit_common(struct sk_buff *skb,
struct net_device *dev,
rcu_read_lock();
port = vnet_tx_port(skb, dev);
- if (unlikely(!port)) {
- rcu_read_unlock();
+ if (unlikely(!port))
goto out_dropped;
- }
if (skb_is_gso(skb) && skb->len > port->tsolen) {
err = vnet_handle_offloads(port, skb, vnet_tx_port);
@@ -1307,7 +1305,6 @@ int sunvnet_start_xmit_common(struct sk_buff *skb, struct
net_device *dev,
fl4.saddr = ip_hdr(skb)->saddr;
rt = ip_route_output_key(dev_net(dev), &fl4);
- rcu_read_unlock();
if (!IS_ERR(rt)) {
skb_dst_set(skb, &rt->dst);
icmp_send(skb, ICMP_DEST_UNREACH,
@@ -1467,8 +1464,7 @@ int sunvnet_start_xmit_common(struct sk_buff *skb, struct
net_device *dev,
jiffies + VNET_CLEAN_TIMEOUT);
else if (port)
del_timer(&port->clean_timer);
- if (port)
- rcu_read_unlock();
+ rcu_read_unlock();
if (skb)
dev_kfree_skb(skb);
vnet_free_skbs(freeskbs);
--
1.7.1
