> -Original Message-
> From: Andiry Xu [mailto:and...@gmail.com]
> Sent: 05 November 2013 17:40
> To: David Laight
> Cc: Linux-USB; Sarah Sharp
> Subject: Re: [PATCH] usb: xhci: Optimise setup of isochronous transfers
>
> On Tue, Nov 5, 2013 at 6:21
On Tue, Nov 5, 2013 at 6:21 AM, David Laight wrote:
>
> Close inspection shows that xhci_queue_isoc_tx() can only fail if
> prepare_transfer() gets an error from usb_hcd_link_urb_to_ep() for
> the first TD. The call to prepare_ring() cannot fail because an initial
> check is made to ensure the rin
Close inspection shows that xhci_queue_isoc_tx() can only fail if
prepare_transfer() gets an error from usb_hcd_link_urb_to_ep() for
the first TD. The call to prepare_ring() cannot fail because an initial
check is made to ensure the ring has enough space for all the TD.
The check for 'num_tds' be
