[ofw] ***SPAM*** IoGetDeviceObjectPointer in H/W driver code

[Deepak Gupta]

No it's not a suggestion.

Rather this is my question that "Does callback registered get called in
system thread context by PnP Manager?"

If not then we should make sure that "IoGetDeviceObjectPointer" is called in
system thread context.

MSDN documentation of IoRegisterPlugPlayNotification doesn't specify that
callback will be called in which context.

Regards
Deepak


On Fri, Dec 5, 2008 at 10:51 PM, Sean Hefty <sean.hefty at intel.com> wrote:

> >According to MSDN documentation "IoGetDeviceObjectPointer" should be
> called in
> >system thread context.
>
> >From the WDK docs for IoGetDeviceObjectPointer:
>
> "Callers of IoGetDeviceProperty must be running at IRQL = PASSIVE_LEVEL in
> the
> context of a system thread."
>
> >How are we making sure that callback is being called in system thread
> context?
> >Are callbacks registered using "IoRegisterPlugPlayNotification" called in
> >system thread context?
>
> And for IoRegisterPlugPlayNotification:
>
> "The PnP manager calls driver callback routines at IRQL = PASSIVE_LEVEL"
>
> Are you suggesting that the PnP manager does not use a system thread?
>
> - Sean
>
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