[dpdk-dev] [PATCH v4 8/8] net/netvsc: avoid possible live lock

[Stephen Hemminger]

Since the ring buffer with host is shared for both transmit
completions and receive packets, it is possible that transmitter
could get starved if receive ring gets full.

Better to process all outstanding events which frees up transmit
buffer slots, even if means dropping some packets.

Fixes: 7e6c82430702 ("net/netvsc: avoid over filling Rx descriptor ring")
Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 drivers/net/netvsc/hn_rxtx.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/net/netvsc/hn_rxtx.c b/drivers/net/netvsc/hn_rxtx.c
index cbdfcc628b75..19f00a05285f 100644
--- a/drivers/net/netvsc/hn_rxtx.c
+++ b/drivers/net/netvsc/hn_rxtx.c
@@ -1032,9 +1032,6 @@ uint32_t hn_process_events(struct hn_data *hv, uint16_t queue_id,
 
 		if (tx_limit && tx_done >= tx_limit)
 			break;
-
-		if (rxq->rx_ring && rte_ring_full(rxq->rx_ring))
-			break;
 	}
 
 	if (bytes_read > 0)
-- 
2.20.1