Can't netboot on Raspberry Pi Compute Module 3 Lite with the lastest firmware

[jpduell]

I have a many CM3L boards network booting happily with an old bootcode.bin (unsure of the version, but quite old).

I tried the newest available for both the Master and Stable branches and the CM3L boards seem to hang after grabbing bootcode.bin from the TFTP server. Rolling back to a slightly older bootcode.bin allows them to boot successfully.

I must mention that I'm using LAN9512s instead of the usual LAN9514s found on the Raspberry Pi 3 B boards.

[popcornmix]

Can you identify the exact bootcode.bin update which caused this?

[jpduell]

Sure thing.

Working: 80e1fbeb78
Not Working: 58395c1ea3

I tried one known-working CM3L five times with bootcode.bin files from each of those commits. The 80e1fbe bootcode.bin always netbooted successfully. The 58395c1 bootcode.bin would never request past bootcode.bin during boot.

[popcornmix]

@ghollingworth looks like "Insert delay between disconnect and reconnect for USB device booting" is to blame. Any ideas?