Why does IoAttachDeviceToDeviceStack fail?

NTDEV
1

Under what circumstances does IoAttachDeviceToDeviceStack fail in an AddDevice callback of
a HID filter driver?

Any suggestions on how can I figure out why it fails?

2

This function would fail if the target device is in the process of being
initialized (DO_DEVICE_INITIALIZING is set), unloaded, removed or deleted.
So check the target deviceobject status using !devobj in the debugger before
attaching. That will tell you state.

-Eliyas

-----Original Message-----
From: Chris Telting [mailto:xxxxx@mindspring.com]
Sent: Tuesday, September 19, 2000 12:23 PM
To: NT Developers Interest List
Subject: [ntdev] Why does IoAttachDeviceToDeviceStack fail?

Under what circumstances does IoAttachDeviceToDeviceStack fail in an
AddDevice callback of
a HID filter driver?

Any suggestions on how can I figure out why it fails?

You are currently subscribed to ntdev as: xxxxx@microsoft.com
To unsubscribe send a blank email to $subst(‘Email.Unsub’)

3

The target device is not initialized or “unload pending”.

----- Original Message -----
From: “Chris Telting”
To: “NT Developers Interest List”
Sent: Tuesday, September 19, 2000 11:23 PM
Subject: [ntdev] Why does IoAttachDeviceToDeviceStack fail?

> Under what circumstances does IoAttachDeviceToDeviceStack fail in an
AddDevice callback of
> a HID filter driver?
>
> Any suggestions on how can I figure out why it fails?
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to $subst(‘Email.Unsub’)
>