Hi eliyas
Thanks for the information.
Srinivas
-----Original Message-----
From: Eliyas Yakub [mailto:xxxxx@microsoft.com]
Sent: Monday, June 11, 2001 11:16 AM
To: NT Developers Interest List
Subject: [ntdev] Re: IRP Minor function value is wrong some times IRP_
MJ_PNP
On a checked build system, the PNP Manager sends a bug IRP
(MinorFunction = 0xff) to see whether you are following the PNP rules
properly. The rule is that if your driver doesn’t understand or perform
any action on a PNP IRP, it must forward that to the next driver:
- Call IoSkipCurrentIrpStackLocation to remove its stack location from
the IRP. - Do not set any fields in Irp->IoStatus.
- Do not set an IoCompletion routine.
- Do not complete the IRP. (Do not call IoCompleteRequest.) The parent
bus driver will complete the IRP. - Pass the IRP to the next-lower driver with IoCallDriver.
-Eliyas
-----Original Message-----
From: Hassan I Khan [mailto:xxxxx@hotmail.com]
Sent: Monday, June 11, 2001 10:29 AM
To: NT Developers Interest List
Subject: [ntdev] Re: IRP Minor function value is wrong some times IRP_
MJ_PNP
Now this is strange. I would just pass this junk down and see what
happens.
Or complete it without changing anything. I remember seeing 0x1b but
don’t
remember if I saw 0xff. In my case, everything unknown/unexpected was
driven
to my ‘default’ case and since it was a function driver I was just
passing
that stuff down. Later magically, when my driver matured a bit I stopped
receiving this junk ! Then I never bothered to recreate that pesky
situation. Hope this ‘technique’ would work for you as well : )
regards,
Hassan
From: Srinivasa Rao Deevi
>Reply-To: “NT Developers Interest List”
>To: “NT Developers Interest List”
>Subject: [ntdev] Re: IRP Minor function value is wrong some times IRP_
>MJ_PNP
>Date: Sun, 10 Jun 2001 12:24:41 -0700
>
>Hi Hassan
>
>Thanks for the reply . I am seeing some other Minor function values
also.
>Like 0xff, 0x1b . I just checked the ntddk.h to see those values have
any
>meaning. I could not find any . When I checked Irp parameters except
the
>Minor function values remaining seems to be good . Have any idea what
is
>going on here ?
>
>Thanks in advance
>srinivas
>
>-----Original Message-----
>From: xxxxx@hotmail.com [mailto:xxxxx@hotmail.com]
>Sent: Sunday, June 10, 2001 7:59 AM
>To: NT Developers Interest List
>Subject: [ntdev] Re: IRP Minor function value is wrong some times
>IRP_MJ_PNP
>
>
>When I faced the same situation, I found 0x18 corresponds to
>IRP_MN_QUERY_LEGACY_BUS_INFORMATION which is not defined in wdm.h but
is
>defined in ntddk.h.
>
>Eliyas advised that just pass the IRP down if yours is a function or
filter
>driver or complete without changing the IoStatus if it is a bus driver.
>
>But I had to do
>#defined IRP_MN_QUERY_LEGACY_BUS_INFORMATION 0x18 myself since I was
not
>using ntddk.h
>
>Hassan
>
>On 06/10/01, “Srinivasa Rao Deevi ” wrote:
> > Hi all
> >
> > I am seeing some wrong parameters coming from IRP . In an IRP with
major
> > function code IRP_MJ_PNP the Minor Function value is sometimes
morethan
> > 0x17 which is no mean to IRP_MJ_PNP . As far as PNP is concerned the
IRP
> > generation is done by PNP manager I believe . Can anybody has any
idea
>how
> > this problem is coming ?
> >
> > Thanks in advance
> > srinivas
> >
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