Re: [RFC] New Driver Model for 2.5

[Benjamin Herrenschmidt]

>> I really don't think it's _that_ difficult to properly do this blocking.
>> For things like sound drivers, a simple semaphore is plenty enough. For
>
>Sound is more easily handled by not blocking user space but waiting until
>the final IRQ off moment and grabbing the registers. That avoids a lot
>of ugly locking gunge. It literally comes down to

My point about using a semaphore was to avoid getting mixer ioctls
banging the HW while it is shut down.

Ben.