[U-Boot] [PATCH 3/7] usb: dwc2: Throttle the setup packet resending

Stephen Warren
2016-05-04T17:08:22Z

On 05/03/2016 02:51 PM, Marek Vasut wrote:
> Abort the request in case any of the tokens in the packet failed to
> complete transfer 10 times. This is a precaution needed so that we
> don't end in endless loop when scanning the bus with some braindead
> devices.

Does this affect USB keyboards when SYS_USB_EVENT_POLL_VIA_CONTROL_EP is
enabled? IIRC control transactions to HID devices can be held off for
some duration based on polling intervals, and this patch might abort
them early?

Or do we typically expect to use interrupt transfers for keyboards, so
this isn't too relevant (although there are some platforms that enable
SYS_USB_EVENT_POLL_VIA_CONTROL_EP). Maybe not DWC2 platforms though; I
didn't check.