[PATCH v2 5/5] net/cpfl: fix Rx data buffer size

[Wenjun Wu]

This patch does two fixes.

1. No matter what the mbuf size is, the data buffer size should not
be greater than 16K - 128.

2. Align data buffer size to 128.

Fixes: 119834846e93 ("net/cpfl: support Rx queue setup")
Cc: stable at dpdk.org

Signed-off-by: Wenjun Wu <wenjun1.wu at intel.com>
---
 drivers/net/cpfl/cpfl_rxtx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/cpfl/cpfl_rxtx.c b/drivers/net/cpfl/cpfl_rxtx.c
index de59b31b3d..75021c3c54 100644
--- a/drivers/net/cpfl/cpfl_rxtx.c
+++ b/drivers/net/cpfl/cpfl_rxtx.c
@@ -155,7 +155,8 @@ cpfl_rx_split_bufq_setup(struct rte_eth_dev *dev, struct idpf_rx_queue *rxq,
 	bufq->adapter = base;
 
 	len = rte_pktmbuf_data_room_size(bufq->mp) - RTE_PKTMBUF_HEADROOM;
-	bufq->rx_buf_len = len;
+	bufq->rx_buf_len = RTE_ALIGN_FLOOR(len, (1 << IDPF_RLAN_CTX_DBUF_S));
+	bufq->rx_buf_len = RTE_MIN(bufq->rx_buf_len, IDPF_RX_MAX_DATA_BUF_SIZE);
 
 	/* Allocate a little more to support bulk allocate. */
 	len = nb_desc + IDPF_RX_MAX_BURST;
-- 
2.34.1