[PATCH 1/2] usb: dwc2: handle NAK when CHHLTD does not fire

[Sascha Hauer]

Hi,

On Mon, Apr 20, 2026 at 10:28:58PM -0400, anis chali wrote:
> Hi.
> 
> On Raspberry pi cm 4, with only the patch usb: dwc2: handle NAK when
> CHHLTD does not fire,
> the usb controller does not work and displays indefinitely the message
> below even if no usb storage plugged in
> ERROR: dwc2 fe980000.usb at 7e980000.of: Timeout on bulk endpoint
> I did the test with the patch series and I get the same behaviour,
> console continuously displaying the timeout error.

I just tried with only your patch applied and it doesn't work for me. It
seems there is some timing issue involved, because when I add debugging
output at the right places then it works.

I haven't gotten further so far.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |