[U-Boot] [PATCH 0/1] dwc2 USB controller hangs with lan78xx

[Andrew Thomas]

In testing networking with EFI/u-boot, there is an issue where the dwc2
USB controller will hang -- requiring an USB reset. The issue appears to
be the programming of the "Bulk-In Empty Response" in the lan78xx
controller. The patch is a suggested fix.

However, I am not familiar enough with neither the lan78xx nor the
dwc2 to know whether this is the best, or even most appropriate,
fix.

The issue arises readily with EFI/u-boot programs, such
as grub: the uboot EFI code will periodically poll the network adapter
to see if it has received a packet. Generally speaking no packet has
arrived and the attempt to receive will immediatly hang the dwc2
controller. The console will show this message:

Rx: failed to receive: -5

Interestingly, the issue will not arise with request/response protocols,
such as u-boot's dhcp command.


Andrew Thomas (1):
  dwc2 USB controller hangs with lan78xx

 drivers/usb/eth/lan78xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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1.8.3.1