[Q] USB urb completion handler

[Ezequiel Garcia]

Hi,

>> Bingo! Because the driver will only submit *one* urb at a time,
>> how could it possible have more than one completion handlers
>> called at a time?
>
> how about multi-thread try to send urbs on the same pipe with the same
> complete function?

Actually, I was wrong because my driver (being a video capture driver)
submits several
isoc urbs at the same time.

I'm still not sure how this works regarding concurrency, but I guess
(or hope) the usb core calls
the completion handler one at a time OR the device sends interrupts
one at a time for each urb.

I know it's a terrible thing for me to guess (or hope), but these days
I've been testing
the driver under several conditions and it seems to work fine.
So I'm not worrying too much.

If someone more knowledgeable reads this and can put a light upon this issue,
I would appreciate it.

loody: Thanks for your answer regarding context ;)
Ezequiel.