[PATCH v2 3/4] net/ark: improve ring handling for segmented packets

[Ed Czeck <ed.czeck@atomicrules.com>]

handle case where complete packet is not yet available

Signed-off-by: Ed Czeck <ed.czeck@atomicrules.com>
---
 drivers/net/ark/ark_ethdev_rx.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ark/ark_ethdev_rx.c b/drivers/net/ark/ark_ethdev_rx.c
index 6077d98ae0..1b5c4b64a4 100644
--- a/drivers/net/ark/ark_ethdev_rx.c
+++ b/drivers/net/ark/ark_ethdev_rx.c
@@ -313,11 +313,15 @@ eth_ark_recv_pkts(void *rx_queue,
 			}
 		}
 
-		if (unlikely(meta->pkt_len > queue->dataroom))
-			cons_index = eth_ark_rx_jumbo
-				(queue, meta, mbuf, cons_index + 1);
-		else
+		if (unlikely(meta->pkt_len > queue->dataroom)) {
+			uint32_t tcons = eth_ark_rx_jumbo(queue, meta, mbuf, cons_index + 1);
+			if ((int32_t)(prod_index - tcons) >= 0)
+				cons_index = tcons; /* nominal condition */
+			else
+				break;
+		} else {
 			cons_index += 1;
+		}
 
 		rx_pkts[nb] = mbuf;
 		nb++;
-- 
2.34.1