On Mon, Nov 26, 2018 at 10:34:13AM +, li qiang wrote:
>
> 在 2018/11/26 18:08, Gerd Hoffmann 写道:
> > The token field contains the (guest-filled) state of the qtd, which
> > indicates whenever the other fields are valid or not. So make sure
> > we read the token first, otherwise we may end up w
在 2018/11/26 18:08, Gerd Hoffmann 写道:
> The token field contains the (guest-filled) state of the qtd, which
> indicates whenever the other fields are valid or not. So make sure
> we read the token first, otherwise we may end up with an stale next
> pointer:
>
>(1) ehci reads next
>(2) gue
The token field contains the (guest-filled) state of the qtd, which
indicates whenever the other fields are valid or not. So make sure
we read the token first, otherwise we may end up with an stale next
pointer:
(1) ehci reads next
(2) guest writes next
(3) guest writes token
(4) ehci rea
