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From: jeh@cmkrnl.com (Jamie Hanrahan)
Newsgroups: comp.os.ms-windows.programmer.nt.kernel-mode
Subject: Re: Various beginner questions on DDK - Does Art Baker's Full Duplex 
Message-ID: <1998Jan14.145004.8409@cmkrnl>
Date: 14 Jan 98 14:50:04 PST
References: <69fmvs$b2v$1@smilodon.ecp.fr> <01bd20db$c00a7780$725e9082@mniw0055>
Organization: Kernel Mode Systems, San Diego, CA
Lines: 20

In article <01bd20db$c00a7780$725e9082@mniw0055>, "Tom Thornhill" <tthornhi@best.ms.philips.com-SPAM-ME-NOT> writes:
> A call to IoStartNextPacket won't result in a re-entrant call to StartIo[1],
> [1] This is my assumption - the DDK says this, and I haven't seen it happen.

Actually it can, if you call IoStartNextPacket from your StartIo 
routine.  (Try it.)  Where did you see this in the doc?

If on the other hand you call it only from your DPC routine, there's no 
problem, as the DPC mechanism "pops the stack".  

Therefore: If you need to call IoStartNextPacket "from your StartIo 
routine", have the StartIo routine queue a DPC and let the DPC call 
IoStartNextPacket. 

	--- Jamie Hanrahan, Kernel Mode Systems, San Diego CA
        Internet: jeh@cmkrnl.com (JH645)  CompuServe: 74140,2055  
drivers, internals, networks, applications, and training for VMS and Windows NT
NT driver FAQ, links, and other information:  http://www.cmkrnl.com/

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