diff options
| author |   Dhananjay Phadke <dhananjay@netxen.com> | 2009-05-05 19:05:06 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2009-05-06 15:33:35 -0700 |
| commit | 22527864ed7ee6c50f3c4d4b03c83c963caf5c0b (patch) | |
| tree | 074c3dce3fe61b54aec6c7d8a829c4fa7592a6c0 /drivers/net/netxen/netxen_nic_init.c | |
| parent | lasi_82596: fix printk format warning (diff) | |
| download | linux-dev-22527864ed7ee6c50f3c4d4b03c83c963caf5c0b.tar.xz linux-dev-22527864ed7ee6c50f3c4d4b03c83c963caf5c0b.zip | |
netxen: fix race in tx ring acccess
Fix the distance check between tx ring producer and consumer that
could lead to tx ring wrap around.
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netxen/netxen_nic_init.c')
| -rw-r--r-- | drivers/net/netxen/netxen_nic_init.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/netxen/netxen_nic_init.c b/drivers/net/netxen/netxen_nic_init.c index d18216779a09..de9ebbd841b7 100644 --- a/drivers/net/netxen/netxen_nic_init.c +++ b/drivers/net/netxen/netxen_nic_init.c @@ -1319,10 +1319,11 @@ int netxen_process_cmd_ring(struct netxen_adapter *adapter) break; } - if (count) { - tx_ring->sw_consumer = sw_consumer; + tx_ring->sw_consumer = sw_consumer; + + if (count && netif_running(netdev)) { smp_mb(); - if (netif_queue_stopped(netdev) && netif_running(netdev)) { + if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) { netif_tx_lock(netdev); netif_wake_queue(netdev); smp_mb(); @@ -1450,7 +1451,6 @@ netxen_post_rx_buffers_nodb(struct netxen_adapter *adapter, rds_ring->producer = producer; NXWR32(adapter, rds_ring->crb_rcv_producer, (producer - 1) & (rds_ring->num_desc - 1)); - wmb(); } spin_unlock(&rds_ring->lock); } |