1.9
On Fri, Sep 26, 2014 at 3:25 PM, Doron Holan
wrote:
> What version of WDF?
>
>
>
> From: xxxxx@lists.osr.com [mailto:
> xxxxx@lists.osr.com] *On Behalf Of *Roscoe Casita
> Sent: Friday, September 26, 2014 2:57 PM
> To: Windows System Software Devs Interest List
> Subject: Re: RE:[ntdev] [Beginner] Send Async Write Request to Remote
> I/O Target
>
>
>
> Wow! thanks for chiming in Doron!
>
>
>
>
>
> Your describing exactly the behavior that the sample did!
>
>
>
> 1. Create new request for the remote target.
>
> 2. Set the memory reference to the old memory reference.
>
> 3. Set the completion routine.
>
> 4. Send the request.
>
> 5. In the call back routine, Get the status code and information.
>
> 6. Delete the request.
>
> 7. complete the original request with the status code and information: ->
> BSOD because reference to the memory object.
>
>
>
> The following steps Don’t create the bsod:
>
>
>
> 1. Create new request for the remote target.
>
> 2. Set the memory reference to the old memory reference.
>
> 3. Set the completion routine.
>
> 4. Send the request.
>
> 5. In the call back routine, Get the status code and information.
>
> 6. Reset the Request.
>
> 7. Delete the request.
>
> 8. complete the original request with the status code and information: ->
> BSOD because reference to the memory object.
>
>
>
> Thanks again for the input!
>
>
>
> On Fri, Sep 26, 2014 at 2:18 PM, Doron Holan
> wrote:
>
> This would probably because the new request takes a reference on the
> wdfmemory object of the parent request. When you complete a parent request
> we want to make sure you are not creating a hand grenade by leaving
> dangling references to memory. If the number of references on the WDFMEMORY
> in the request are >0, we stop with a WDF violation.
>
>
>
> When you format the new request, that takes a reference on the parent
> request WDFMEMORY (assuming you pass it in). That reference through the
> format action is still there when the new request completes back to your
> driver. You can clear that reference by either
>
> a) Deleting the new request
>
> b) Reseting the request, thus clearing the format, thus releasing
> the reference
>
>
>
> d
>
>
>
> From: xxxxx@lists.osr.com [mailto:
> xxxxx@lists.osr.com] *On Behalf Of *Roscoe Casita
> Sent: Friday, September 26, 2014 2:13 PM
> To: Windows System Software Devs Interest List
> Subject: RE:[ntdev] [Beginner] Send Async Write Request to Remote I/O
> Target
>
>
>
> That is the summary. The important part is I dug around on msdn for a long
> time and still have not found information that dictates this usage.
>
> On Sep 26, 2014 4:51 PM, wrote:
>
> Sorry, Ros… I stopped reading at the code and didn’t see the attached
> dump.
>
> It’s weird. So, to summarize: if you reset the new request for reuse
> before deleting the object you’re “good to go” 
but if you do not
> “reuse” the Request… It blue screens? Is that the summary?
>
> Peter
> OSR
> @OSRDrivers
>
>
> —
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> —
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>
> OSR is HIRING!! See http://www.osr.com/careers
>
> For our schedule of WDF, WDM, debugging and other seminars visit:
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> To unsubscribe, visit the List Server section of OSR Online at
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>
>
> –
> Thanks in advance,
>
> Roscoe Casita
>
> — NTDEV is sponsored by OSR Visit the list at:
> http://www.osronline.com/showlists.cfm?list=ntdev OSR is HIRING!! See
> http://www.osr.com/careers For our schedule of WDF, WDM, debugging and
> other seminars visit: http://www.osr.com/seminars To unsubscribe, visit
> the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>
> —
> NTDEV is sponsored by OSR
>
> Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev
>
> OSR is HIRING!! See http://www.osr.com/careers
>
> For our schedule of WDF, WDM, debugging and other seminars visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>
–
Thanks in advance,
Roscoe Casita