[dpdk-stable] [PATCH] eventdev: fix missing update to Rx adaper WRR position

[Nikhil Rao]

After dequeuing Rx packets and enqueueing them to the
temporary buffer towards eventdev, the packet Rx loop exits
if the temporary buffer is full but the current WRR position
is not saved.

Save away the current value of the WRR position, so packets
are dequeued from the correct Rx queue in the next invocation.

Fixes: 9c38b704d280 ("eventdev: add eth Rx adapter implementation")
Suggested-by: Gage Eads <gage.eads at intel.com>
Signed-off-by: Nikhil Rao <nikhil.rao at intel.com>
Cc: stable at dpdk.org
---
 lib/librte_eventdev/rte_event_eth_rx_adapter.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eventdev/rte_event_eth_rx_adapter.c b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
index 6f70509..53a3788 100644
--- a/lib/librte_eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/librte_eventdev/rte_event_eth_rx_adapter.c
@@ -517,8 +517,10 @@ static uint16_t gcd_u16(uint16_t a, uint16_t b)
 		 */
 		if (buf->count >= BATCH_SIZE)
 			flush_event_buffer(rx_adapter);
-		if (BATCH_SIZE > (ETH_EVENT_BUFFER_SIZE - buf->count))
+		if (BATCH_SIZE > (ETH_EVENT_BUFFER_SIZE - buf->count)) {
+			rx_adapter->wrr_pos = wrr_pos;
 			break;
+		}
 
 		stats->rx_poll_count++;
 		n = rte_eth_rx_burst(d, qid, mbufs, BATCH_SIZE);
-- 
1.8.3.1