On 06/21/2018 10:37 AM, Peter Robinson wrote:
On Mon, Jun 18, 2018 at 7:56 PM, Andrew Thomas <andrew.tho...@oracle.com> wrote:
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.
Alex
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