Re: [PATCH 0/9 v5 resend] xHCI ring expansion patchset

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On Mon, 5 Mar 2012, Andiry Xu wrote:

> I've some questions, not quite related to the patchset...
> 1. Does usbtest require specific compliant device? I used a USB2.0 storage
> device, and some test cases fail with unmatched transfer length and unexpected
> status.

usbtest does not require a specific device.  But if you do have a
compliant device then you can run more of the tests.

> 2. What will happen if the host driver does not call usb_hcd_link_urb_to_ep() in
> enqueue() method? In my original design, the host driver will "suspend" the urbs
> in some cases, does not queue them immediately, just return enqueue() as
> successful and queue them later. In this case, does the host driver need to
> call usb_hcd_link_urb_to_ep() before it returns?    

Yes, it does.  Read the code and you'll see why.

Alan Stern

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