Date: Sun, 17 Sep 2017 10:56:27 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Mark Millard <markmi@dsl-only.net>, freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: Part of why Pine64+ 2GB gets "uhub_attach: getting USB 2.0 HUB descriptor failed,error=USB_ERR_SHORT_XFER" (and so USB fails) Message-ID: <46d91194-84ff-50e3-97e6-6f9cef3ea2e7@selasky.org> In-Reply-To: <AF0AC3CE-5B33-4E28-B091-FCE9EAC87642@dsl-only.net> References: <AF0AC3CE-5B33-4E28-B091-FCE9EAC87642@dsl-only.net>
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On 09/17/17 10:09, Mark Millard wrote:
> . . .
> uint16_t length;
> uint16_t temp;
> . . .
> length = UGETW(req->wLength);
> . . .
> USB_BUS_LOCK(udev->bus);
> err = (hr_func) (udev, req, &desc, &temp);
> USB_BUS_UNLOCK(udev->bus);
>
> if (err)
> goto done;
>
> if (length > temp) {
> if (!(flags & USB_SHORT_XFER_OK)) {
> err = USB_ERR_SHORT_XFER;
> goto done;
> }
> length = temp;
> }
Can you dump the length arguments. Usually short transfer means that the
descriptor was shorter than expected.
--HPS
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