ethdev: fix max Rx packet length

[dpdk.git] / drivers / net / mlx4 / mlx4_rxq.c

diff --git a/drivers/net/mlx4/mlx4_rxq.c b/drivers/net/mlx4/mlx4_rxq.c
index 2b75c07..1801d87 100644 (file)
--- a/drivers/net/mlx4/mlx4_rxq.c
+++ b/drivers/net/mlx4/mlx4_rxq.c
@@ -753,6 +753,7 @@ mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
        int ret;
        uint32_t crc_present;
        uint64_t offloads;
+       uint32_t max_rx_pktlen;
 
        offloads = conf->offloads | dev->data->dev_conf.rxmode.offloads;
 
@@ -829,13 +830,11 @@ mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
        dev->data->rx_queues[idx] = rxq;
        /* Enable scattered packets support for this queue if necessary. */
        MLX4_ASSERT(mb_len >= RTE_PKTMBUF_HEADROOM);
-       if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
-           (mb_len - RTE_PKTMBUF_HEADROOM)) {
+       max_rx_pktlen = dev->data->mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN;
+       if (max_rx_pktlen <= (mb_len - RTE_PKTMBUF_HEADROOM)) {
                ;
        } else if (offloads & DEV_RX_OFFLOAD_SCATTER) {
-               uint32_t size =
-                       RTE_PKTMBUF_HEADROOM +
-                       dev->data->dev_conf.rxmode.max_rx_pkt_len;
+               uint32_t size = RTE_PKTMBUF_HEADROOM + max_rx_pktlen;
                uint32_t sges_n;
 
                /*
@@ -847,21 +846,19 @@ mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
                /* Make sure sges_n did not overflow. */
                size = mb_len * (1 << rxq->sges_n);
                size -= RTE_PKTMBUF_HEADROOM;
-               if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
+               if (size < max_rx_pktlen) {
                        rte_errno = EOVERFLOW;
                        ERROR("%p: too many SGEs (%u) needed to handle"
                              " requested maximum packet size %u",
                              (void *)dev,
-                             1 << sges_n,
-                             dev->data->dev_conf.rxmode.max_rx_pkt_len);
+                             1 << sges_n, max_rx_pktlen);
                        goto error;
                }
        } else {
                WARN("%p: the requested maximum Rx packet size (%u) is"
                     " larger than a single mbuf (%u) and scattered"
                     " mode has not been requested",
-                    (void *)dev,
-                    dev->data->dev_conf.rxmode.max_rx_pkt_len,
+                    (void *)dev, max_rx_pktlen,
                     mb_len - RTE_PKTMBUF_HEADROOM);
        }
        DEBUG("%p: maximum number of segments per packet: %u",