Re: [BUG] oops while completing async USB via usbdevio

[Harald Welte <laforge@gnumonks.org>]

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On Tue, May 31, 2005 at 01:07:03AM +0200, Oliver Neukum wrote:
> 
> > and it prints "p->sighand == NULL" every time I exit a program while
> > using the usbdevio based driver.
> > 
> > consequently, the following patch 'fixed' the problem.  Please do not
> > consider this as a real fix, since there's certainly still a race
> > condition left.   Please use it as a hint to correctly fix the problem.
> 
> It would be cleaner to terminate all URBs a task has submitted when the
> task terminates.

so for every task termination, we do a linear search over the global
list of pending URB's and terminate those where urb->task ==
taks_to_kill?  Sounds a bit expensive, especially since you don't know
(before iteration) whether that task has actually ever dealt with
usbdevio or not.

-- 
- Harald Welte <laforge@gnumonks.org>          	        http://gnumonks.org/
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