drivers: enet: eth_nxp_enet_mac: Could not alloc RX pkt

elby — Thu, 03 Jul 2025 12:14:37 GMT

I am seeing this "Could not alloc RX pkt" error message with NXP MCXN947 - http_server example.

At the beginning, it all seems okay however after 10 minutes the network statistics freezes and after 5 - 10 minutes I see this error.

When this error appears everything freezes.

This is environment:

OS: Windows
Zephyr: 4.1.99
Board: NXP FRDM MCXN947

To reproduce the issue:

Take the sample http_server code and add the following line to the prj.conf

CONFIG_ETH_NXP_ENET_QOS_TX_BUFFER_DESCRIPTORS=16
CONFIG_ETH_NXP_ENET_QOS_RX_BUFFER_DESCRIPTORS=16

Is this something to do with Zephyr?

Re: drivers: enet: eth_nxp_enet_mac: Could not alloc RX pkt

Harry_Zhang — Mon, 07 Jul 2025 06:30:40 GMT

I see a similar issue in Zephyr project:

I think you can discuss it here, where experts on the subject can help you.

Harry