The RTE_ALIGN macro is aligned upwards. If the buf_size variable is not
aligned with 1 << I40E_RXQ_CTX_DBUFF_SHIFT, the rx_buf_len is larger than
the actual mbuf memory after the operation. When receiving the packet, if
the packet is larger than the configured buf_size, it will cause a memory
stepping event.
The patch uses the RTE_ALIGN_FLOOR down alignment macro to correct the
problem.
Fixes: 69dd4c3d0898 ("net/avf: enable queue and device")
Cc: sta...@dpdk.org
Signed-off-by: Qiming Chen <chenqiming_hua...@163.com>
---
drivers/net/iavf/iavf_rxtx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index 59448eae98..79243cddc0 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -619,7 +619,7 @@ iavf_dev_rx_queue_setup(struct rte_eth_dev *dev, uint16_t
queue_idx,
rxq->crc_len = 0;
len = rte_pktmbuf_data_room_size(rxq->mp) - RTE_PKTMBUF_HEADROOM;
- rxq->rx_buf_len = RTE_ALIGN(len, (1 << IAVF_RXQ_CTX_DBUFF_SHIFT));
+ rxq->rx_buf_len = RTE_ALIGN_FLOOR(len, (1 << IAVF_RXQ_CTX_DBUFF_SHIFT));
/* Allocate the software ring. */
len = nb_desc + IAVF_RX_MAX_BURST;
--
2.30.1.windows.1
