IRP_MN_START_DEVICE null resource list

NTDEV
1

Hi all,

I am porting my winnt driver to Win 2k

I have done following changes

In DriverEntry,

  1. Registered AddDevice Routine
  2. Rgistered Routine for IRP_MJ_PNP
    & other IRP_MJs are already initialised.

My AddDevice Routine is called & I create DeviceObject & SymbolicLink
successfully. I’ve stored the PDeviceObject input to my routine.

Now when my IRP_MN_START_DEVICE is called the resource list I get is NULL
what can be the reason??

Also I noticed one thing … before calling IRP_MN_START_DEVICE, my PnP
dispatch routine is called for IRP_MN_QUERY_LEGACY_BUS_INFORMATION which I
found is reserved for system use…

Can anyone please help me out…

Thanx,

SP.

2

Check what your driver returns for IRP_MN_FILTER_RESOURCE_REQUIREMENTS.
You should not return NULL in the IoStatus.Information.

Guru

-----Original Message-----
From: Shailesh [mailto:xxxxx@hotmail.com]
Sent: Friday, July 19, 2002 3:04 PM
To: NT Developers Interest List
Subject: [ntdev] IRP_MN_START_DEVICE null resource list

Hi all,

I am porting my winnt driver to Win 2k

I have done following changes

In DriverEntry,

  1. Registered AddDevice Routine
  2. Rgistered Routine for IRP_MJ_PNP
    & other IRP_MJs are already initialised.

My AddDevice Routine is called & I create DeviceObject & SymbolicLink
successfully. I’ve stored the PDeviceObject input to my routine.

Now when my IRP_MN_START_DEVICE is called the resource list I get is
NULL
what can be the reason??

Also I noticed one thing … before calling IRP_MN_START_DEVICE, my PnP
dispatch routine is called for IRP_MN_QUERY_LEGACY_BUS_INFORMATION which
I
found is reserved for system use…

Can anyone please help me out…

Thanx,

SP.

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3

hi ,

Thanx… thanx a lot for that prompt reply but I feel that my driver is not
called for this IRP… before that itself my IRP_MN_START is called

or is there something else to it??

Thanx,

SP.

4

hi,

& now 'am supporting your said IRP also… but as i siad it’s not called…
I get IRP_MN_QUERY_LEGACY_BUS_INFORMATION… which is reserved for system
use & next I get IRP_MN_START… but the prob is with null resources

what can be the reason ??

thanx,

SP.