On 31 October 2010 12:19, Weongyo Jeong <weongyo.je...@gmail.com> wrote:
> Hello USB guys,
> The following patch is to add a implementation, called `sleepout'.
> Please reviews. I'd like to commit it into HEAD if no objections.
> Adds `sleepout' prototype which is a comic combination of callout(9) and
> taskqueue(8) only for USB drivers to implement one step timer. In
> current USB drivers using callout(9) interface they all have two step
> execution flow as follows:
> 1. callout callback is fired by the interrupt context. Then it needs
> to pass it to USB process context because it could sleep(!) while
> callout(9) don't allow it.
> 2. In the USB process context it operates USB commands that most of
> times it'd be blocked at least 125 us (it'd be always true for USB)
I think it is a good addition.
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