28 Jun
2018
28 Jun
'18
2:49 p.m.
On Mon, Jun 18, 2018 at 11:56:06AM -0700, Andrew Thomas 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.thomas@oracle.com Tested-by: Peter Robinson pbrobinson@gmail.com Reviewed-by: Alexander Graf agraf@suse.de
Applied to u-boot/master, thanks!
--
Tom