[U-Boot] [PATCH 2/7] usb: dwc2: Resend setup packet in all fail cases

[Chin Liang See]

On Tue, 2016-05-03 at 22:51 +0200, Marek Vasut wrote:
> The USB function can respond to a Setup packet with ACK or, in
> case it's busy, it can ignore the Setup packet. The USB function
> usually gets busy if we hammer it with Control EP transfers too
> much (ie. sending multiple Get Descriptor requests in a single
> microframe tends to trigger it on certain USB sticks). The DWC2
> controller will interpret not receiving an ACK after Setup packet
> as XACTERR. Check for this condition and if it happens, retry
> sending the Setup packet.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Chin Liang See <clsee at altera.com>
> Cc: Dinh Nguyen <dinguyen at opensource.altera.com>
> Cc: Hans de Goede <hdegoede at redhat.com>
> Cc: Stefan Roese <sr at denx.de>
> Cc: Stephen Warren <swarren at nvidia.com>
> ---
>  drivers/usb/host/dwc2.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 

Reviewed-by: Chin Liang See <clsee at altera.com>
Tested-by: Chin Liang See <clsee at altera.com>

Thanks
Chin Liang