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Re: protect pmf from network drivers that don't provide if_stop

Martin Husemann <> writes:

> On Tue, Jun 29, 2021 at 03:46:20PM +0930, Brett Lymn wrote:
>> I turned up a fix I had put into my source tree a while back, I think at
>> the time the wireless driver (urtwn IIRC) did not set an entry for
>> if_stop.
> This is a driver bug, we should not work around it but catch it early
> and fix it.

So maybe KASSERT that stop exists, and then call it if non-NULL, so
regular users don't crash, and DIAGNOSTIC does what DIAGNOSTIC is
supposed to do?

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