[PATCH v2 01/10] net/ngbe: fix Rx buffer size in configure register

[Jiawen Wu]

When buffer size is less than 1K, round down makes it 0, which is an
error value.

Fixes: 62fc35e63d0e ("net/ngbe: support Rx queue start/stop")
Cc: stable at dpdk.org

Signed-off-by: Jiawen Wu <jiawenwu at trustnetic.com>
---
 drivers/net/ngbe/ngbe_rxtx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ngbe/ngbe_rxtx.c b/drivers/net/ngbe/ngbe_rxtx.c
index 9fd24fa444..9a646cb6a7 100644
--- a/drivers/net/ngbe/ngbe_rxtx.c
+++ b/drivers/net/ngbe/ngbe_rxtx.c
@@ -2944,7 +2944,10 @@ ngbe_dev_rx_init(struct rte_eth_dev *dev)
 		 */
 		buf_size = (uint16_t)(rte_pktmbuf_data_room_size(rxq->mb_pool) -
 			RTE_PKTMBUF_HEADROOM);
-		buf_size = ROUND_DOWN(buf_size, 0x1 << 10);
+		if (buf_size < 1024)
+			buf_size = ROUND_UP(buf_size, 0x1 << 10);
+		else
+			buf_size = ROUND_DOWN(buf_size, 0x1 << 10);
 		srrctl |= NGBE_RXCFG_PKTLEN(buf_size);
 
 		wr32(hw, NGBE_RXCFG(rxq->reg_idx), srrctl);
-- 
2.27.0