netxen: fix rcv buffer leak

Rcv producer should be read in spin-lock.

Signed-off-by: Amit Kumar Salecha <amit.salecha@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c
index e08527f4b301..c865dda2adf1 100644
--- a/drivers/net/netxen/netxen_nic_init.c
+++ b/drivers/net/netxen/netxen_nic_init.c
@@ -1805,9 +1805,10 @@ netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ringid,
         netxen_ctx_msg msg = 0;
         struct list_head *head;
 
+        spin_lock(&rds_ring->lock);
+
         producer = rds_ring->producer;
 
-        spin_lock(&rds_ring->lock);
         head = &rds_ring->free_list;
         while (!list_empty(head)) {
 
@@ -1829,7 +1830,6 @@ netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ringid,
 
                 producer = get_next_index(producer, rds_ring->num_desc);
         }
-        spin_unlock(&rds_ring->lock);
 
         if (count) {
                 rds_ring->producer = producer;
@@ -1853,6 +1853,8 @@ netxen_post_rx_buffers(struct netxen_adapter *adapter, u32 ringid,
                                         NETXEN_RCV_PRODUCER_OFFSET), msg);
                 }
         }
+
+        spin_unlock(&rds_ring->lock);
 }
 
 static void
@@ -1864,10 +1866,11 @@ netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter,
         int producer, count = 0;
         struct list_head *head;
 
-        producer = rds_ring->producer;
         if (!spin_trylock(&rds_ring->lock))
                 return;
 
+        producer = rds_ring->producer;
+
         head = &rds_ring->free_list;
         while (!list_empty(head)) {