Re: What's the secmantics of IoDetachDevice?

C's driver will have its FastIoDetachDevice callback called (if it exists),
and should detach and destroy C in this callback.

For WDM PnP stacks, this is not interesting - the MN_REMOVE_DEVICE path
should detach and destroy the device objects from bottom to top, nobody will
destroy in the middle.

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@xxxxxxxxxxxxxxxx
http://www.storagecraft.com

"xmllmx" <xmllmx@xxxxxxxxx> wrote in message
news:1186734780.536393.196570@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
The DDK documentation on IoDetachDevice is terribly concise.

Suppose I have a filter A wanting to attach to device object B, and I
attached A to B successfully. Later, another filter C attach itself to
A, so C->A->B make up a device stack. If filter A calls
IoDetachDevice(pDeviceB); then A is sure to be removed from the stack.
However, the question is: Is C still on the top of the stack? (i.e C-
B?)


.

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