[wdmaudiodev] Holding a sync object during a call to GetMapping/ReleaseMapping
- From: Eugene Muzychenko <emuzychenko@xxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Wed, 11 Apr 2007 23:46:25 +0700
Hello!
DDK documentation states that it's dangerous to hold a spin lock
during a call to GetMapping/ReleaseMapping. I think it is because
PortCls uses its own spin lock during a call to some miniport driver
methods.
But is it safe to hold any other synchronization object (mutex or
semaphore) during a call to GetMapping/ReleaseMapping? Could it cause
a cross-lock in a result of, for example, IRP reusing and calling to
MappingAvailable before ReleaseMapping returns?
Regards,
Eugene
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