>>> This bug is the combination of dwc2 USB controller and lan78xx >>> USB ethernet controller, which is the combination in use on >>> the Raspberry Pi Model 3 B+. >>> >>> When the host attempts to receive a packet, but a packet has not >>> arrived, the lan78xx controller responds by setting BIR >>> (Bulk-In Empty Response) to NAK. Unfortunately, this hangs >>> the USB controller and requires the USB controller to >>> be reset. >>> >>> The fix proposed is to have the lan78xx controller respond >>> by setting BIR to ZLP. >>> >>> Signed-off-by: Andrew Thomas <andrew.tho...@oracle.com> >> >> Tested-by: Peter Robinson <pbrobin...@gmail.com> >> >> Tested on the RPi 3B+ and certainly improves this situation a number >> of Fedora users have seen. > > > > What exactly have you tested? > > Even with this patch, I am not reliably to reliably boot into grub. It > almost seems as if the packet buffer keeps getting overwritten by newer > packets so that by the time we process the old ones, the ones we wanted to > see are gone.
Booting to grub and then a local system, it's seemed improved in terms of stability for me and a few other users, at least was more consistent in getting to grub without "Rx: failed to receive: -5" but then from the various testing different Fedora users have seen prior to this patch it seems that the issue is very network/cable/environment specific. I'm fairly certain that this patch doesn't fix the problem but it at least appears from current reports to improve the situation for some users. Peter _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
