Pali

cc: @ManoftheSea @y52 you can be interested in this.

Just in case if somebody want to test or debug this issue please let me know...

Ideally check if this issue with that disk happens also on some x86 computer. In any case, you can report this issue to the linux-nvme at lists.infradead.org address and ask for help there.

Upstream u-boot (in its next branch) has now lot of 32-bit armada / mvebu patches related to SD/eMMC, SATA and UART booting. Also on mailing list are waiting some Clearfog eMMC patches. Likely you should take Helios patches and put then on top of the u-boot next.

There were problems with PCIe bus on A3720 and with lot of patches to pci-aardvark.c PCIe controller driver it could be more stable. About year or two ago I tested in Espressobin 3 or 4 randomly chosen PCIe-based NVMe M.2 disks which I bought in local shop and all worked fine. From your log it looks like an NVMe error, not the PCIe. So I guess it would not be related to PCIe bus (and its wiring or adapter). So try to choose different NVMe disk. Maybe you hit some NVMe related issue...