diff mbox series

[v4,19/22] net/enetc: fix the jumbo frame flag condition for mtu set

Message ID 20210118070428.36998-20-stevex.yang@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers show
Series fix rx packets dropped issue | expand

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Steve Yang Jan. 18, 2021, 7:04 a.m. UTC
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: Gagandeep Singh <g.singh@nxp.com>
Cc: Sachin Saxena <sachin.saxena@oss.nxp.com>

Signed-off-by: Steve Yang <stevex.yang@intel.com>
---
 drivers/net/enetc/enetc.h        | 4 ++++
 drivers/net/enetc/enetc_ethdev.c | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

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