diff mbox series

ethdev: account for smaller MTU when setting default

Message ID 20231107234207.643574-1-joshwash@google.com (mailing list archive)
State Superseded, archived
Delegated to: Ferruh Yigit
Headers
Series ethdev: account for smaller MTU when setting default |

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Commit Message

Joshua Washington Nov. 7, 2023, 11:41 p.m. UTC 
  Currently, if not specified in the user configuration,
rte_eth_dev_configure() sets the MTU of the device to RTE_EHTER_MTU.
This value could potentially be larger than the MTU that the device
supports. This change updates the configured MTU to be the minimum of
the maximum suported MTU and the default DPDK MTU.

Fixes: 1bb4a528c4 ("ethdev: fix max Rx packet length")
Signed-off-by: Joshua Washington <joshwash@google.com>
Signed-off-by: Rushil Gupta <rushilg@google.com>
---
 lib/ethdev/rte_ethdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
index 9163ef47ea..bba94311d3 100644
--- a/lib/ethdev/rte_ethdev.c
+++ b/lib/ethdev/rte_ethdev.c
@@ -1419,7 +1419,8 @@  rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx_q,
 	}
 
 	if (dev_conf->rxmode.mtu == 0)
-		dev->data->dev_conf.rxmode.mtu = RTE_ETHER_MTU;
+		dev->data->dev_conf.rxmode.mtu
+			= RTE_MIN(RTE_ETHER_MTU, dev_info.max_mtu);
 
 	ret = eth_dev_validate_mtu(port_id, &dev_info,
 			dev->data->dev_conf.rxmode.mtu);