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<p class="MsoNormal"><span style="color:#1F497D">Uri,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> I was unable to reproduce the DEBUG ASSERT() firing with ConnectX hardware [enable/disable, shutdown cycles] or Mthca hardware.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The offending ASSERT() was removed to ensure forward progress for all; the PNP port_remove() race condition is still not fully understood.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Stan.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Revision: 3267<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Author: stansmith<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Date: 3:00:15 PM, Friday, August 19, 2011<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Message:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">[BUS] removed DBG ASSERT on Uri's request as it fires during DBG version WHQL testing; I was unable to get the ASSERT to fire on ConnectX disable or shutdown. There is a port destruction race condition here.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Call to port_remove() skipped if !p_ctx as port_remove itself checks for null p_ctx.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">----<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Modified : /gen1/trunk/core/bus/kernel/bus_port_mgr.c<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Uri Habusha [mailto:urih@mellanox.co.il]
<br>
<b>Sent:</b> Thursday, July 21, 2011 4:49 AM<br>
<b>To:</b> Smith, Stan<br>
<b>Cc:</b> ofw@lists.openfabrics.org; Leonid Keller; Tzachi Dar; Gilad Margalit; Benyahu Mizrahi<br>
<b>Subject:</b> issue with checkin# 3122<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Hi Stan,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I adopted your checkin# 3122 - IOC poll on demand.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">When disabling the drive an ASSERT is popup. The ASSERT is in following code in port_mgr_pnp_cb function</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> CL_ASSERT( p_ctx ); <span style="font-family:Wingdings">
ç</span> The problematic assert<o:p></o:p></p>
<p class="MsoNormal"> if (p_ctx)<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> p_bfi = p_ctx->p_bus_filter;<o:p></o:p></p>
<p class="MsoNormal"> CL_ASSERT( p_bfi );<o:p></o:p></p>
<p class="MsoNormal"> if (p_bfi->p_port_mgr->active_ports > 0)<o:p></o:p></p>
<p class="MsoNormal"> cl_atomic_dec( &p_bfi->p_port_mgr->active_ports );<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> port_mgr_port_remove( (ib_pnp_port_rec_t*)p_pnp_rec );<o:p></o:p></p>
<p class="MsoNormal"> break;<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I noticed that in the port_mgr_port_remove there is a check if the ctx is valid or not. So I guess it’s a known issue that can happen. For now I removed the assert in our code.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Please take a look in the code and see if it’s valid fix (if so please change ofw code accordingly) or debug the issue. It happens when disable \enable the low level driver.</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Uri<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D">Uri Habusha</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D">Windows SW Development Lead</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Mellanox Technologies<br>
</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">P.OBox 586, Yokneam 20692</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D">Israel</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Bookman Old Style","serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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