net/i40e: fix Rx data segment buffer length

Buffer length be configured for each data segment should not exceed
the requested value, or device may fill data that exceed the boundary
of memory that be reserved.

Fixes: 4861cde46116 ("i40e: new poll mode driver")
Cc: stable@dpdk.org
Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Reviewed-by: Mark Kavanagh <mark.b.kavanagh@intel.com>
Tested-by: Mark Kavanagh <mark.b.kavanagh@intel.com>

diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index ae64de6..d42c23c 100644 (file)
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -2474,7 +2474,7 @@ i40e_rx_queue_config(struct i40e_rx_queue *rxq)
        case I40E_FLAG_HEADER_SPLIT_DISABLED:
        default:
                rxq->rx_hdr_len = 0;
-               rxq->rx_buf_len = RTE_ALIGN(buf_size,
+               rxq->rx_buf_len = RTE_ALIGN_FLOOR(buf_size,
                        (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
                rxq->hs_mode = i40e_header_split_none;
                break;