From 4d44217b0641c19e750b57c7392c4531c91dda7f Mon Sep 17 00:00:00 2001 From: Steve Yang Date: Mon, 18 Jan 2021 07:04:25 +0000 Subject: [PATCH] net/enetc: fix jumbo frame flag condition for MTU set The jumbo frame uses the 'RTE_ETHER_MAX_LEN' as boundary condition. If the Ether overhead is larger than 18 when it supports VLAN tag, that will cause the jumbo flag rx offload is wrong when MTU size is 'RTE_ETHER_MTU'. This fix will normalize the boundary condition with 'RTE_ETHER_MTU' and overhead even though current overhead is 18. Fixes: 5d5589b0c858 ("net/enetc: support MTU update and jumbo frames") Cc: stable@dpdk.org Signed-off-by: Steve Yang Reviewed-by: Ferruh Yigit --- drivers/net/enetc/enetc.h | 4 ++++ drivers/net/enetc/enetc_ethdev.c | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/enetc/enetc.h b/drivers/net/enetc/enetc.h index 14ef3bc18b..7163633bce 100644 --- a/drivers/net/enetc/enetc.h +++ b/drivers/net/enetc/enetc.h @@ -29,6 +29,10 @@ /* maximum frame size supported */ #define ENETC_MAC_MAXFRM_SIZE 9600 +/* The max frame size with default MTU */ +#define ENETC_ETH_MAX_LEN (RTE_ETHER_MTU + \ + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN) + /* * upper_32_bits - return bits 32-63 of a number * @n: the number we're accessing diff --git a/drivers/net/enetc/enetc_ethdev.c b/drivers/net/enetc/enetc_ethdev.c index 6ff3022874..4d2c9c0474 100644 --- a/drivers/net/enetc/enetc_ethdev.c +++ b/drivers/net/enetc/enetc_ethdev.c @@ -677,7 +677,7 @@ enetc_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) return -EINVAL; } - if (frame_size > RTE_ETHER_MAX_LEN) + if (frame_size > ENETC_ETH_MAX_LEN) dev->data->dev_conf.rxmode.offloads &= DEV_RX_OFFLOAD_JUMBO_FRAME; else -- 2.20.1