If getting errors that look like

pcieport 0000:00:00.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID)
pcieport 0000:00:00.0:   device [14e4:2711] error status/mask=00001000/00002000
pcieport 0000:00:00.0:    [12] Timeout               
pcieport 0000:00:00.0: AER: Corrected error received: 0000:00:00.0
pcieport 0000:00:00.0: AER: can't find device of ID0000
pcieport 0000:00:00.0: AER: Corrected error received: 0000:00:00.0

…on node 3 of a Turing Pi 2 board, add pcie_aspm=off to your kernel command line to disable PCIe Active State Power Management.

On Raspberry Pi OS, this can be done in the /boot/cmdline.txt file.