net/netvsc: remove process event optimization

Remove unlocked check for data in receive ring.
This check is not safe because of missing barriers etc.

Fixes: 4e9c73e96e83 ("net/netvsc: add Hyper-V network device")
Cc: stable@dpdk.org
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/drivers/net/netvsc/hn_rxtx.c b/drivers/net/netvsc/hn_rxtx.c
index 32c03e3..e8df846 100644 (file)
--- a/drivers/net/netvsc/hn_rxtx.c
+++ b/drivers/net/netvsc/hn_rxtx.c
@@ -969,10 +969,6 @@ uint32_t hn_process_events(struct hn_data *hv, uint16_t queue_id,
 
        rxq = queue_id == 0 ? hv->primary : dev->data->rx_queues[queue_id];
 
-       /* If no pending data then nothing to do */
-       if (rte_vmbus_chan_rx_empty(rxq->chan))
-               return 0;
-
        /*
         * Since channel is shared between Rx and TX queue need to have a lock
         * since DPDK does not force same CPU to be used for Rx/Tx.