Re: [PATCH v1] media: uvcvideo: handle urb completion in a work queue

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On Tue, 8 Sep 2015, Hans de Goede wrote:

> Hi,
> 
> On 09/07/2015 06:23 PM, Mian Yousaf Kaukab wrote:
> > urb completion callback is executed in host controllers interrupt
> > context. To keep preempt disable time short, add urbs to a list on
> > completion and schedule work to process the list.
> >
> > Moreover, save timestamp and sof number in the urb completion callback
> > to avoid any delays.
> 
> Erm, I thought that we had already moved to using threaded interrupt
> handling for the urb completion a while (1-2 years ?) back. Is this then
> still needed ?

We moved to handling URB completions in a tasklet, not a threaded
handler.  (Similar idea, though.)  And the change was made in only one
or two HCDs, not in all of them.

Alan Stern

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