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    <body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI] igt@drv_selftest@live_hangcheck - incomplete - Softdog"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=104262">bug 104262</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>FIXED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI] igt@drv_selftest@live_hangcheck - incomplete - Softdog"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=104262#c3">Comment # 3</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI] igt@drv_selftest@live_hangcheck - incomplete - Softdog"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=104262">bug 104262</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>Optimistically:

commit fcb1de54e2d9c84a2d3275d1febde00e92d45aa0
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date:   Tue Dec 19 09:01:10 2017 +0000

    drm/i915: Add a strong mb to resetting the has-CS-interrupt bit

    After a reset, the state of the CSB registers are scrubbed and not valid
    until a powercontext is reloaded. We only know when a powercontext has
    been reloaded once we see a CS-interrupt, before then we must ignore the
    CSB registers within the execlists_submission_tasklet. However, glk is
    sporadically dying with an illegal CSB pointer value (both in the HSWP
    and mmio) suggesting that it is running with the CS-interrupt bit set
    before the powercontext has been reloaded. Make sure the clearing of
    that bit is serialised on reset with the re-enabling of the tasklet.

    References: <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - [CI] igt@drv_selftest@live_hangcheck - incomplete - Softdog"
   href="show_bug.cgi?id=104262">https://bugs.freedesktop.org/show_bug.cgi?id=104262</a>
    Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
    Cc: Tvrtko Ursulin <<a href="mailto:tvrtko.ursulin@intel.com">tvrtko.ursulin@intel.com</a>>
    Cc: MichaƂ Winiarski <<a href="mailto:michal.winiarski@intel.com">michal.winiarski@intel.com</a>>
    Cc: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>>
    Link:
<a href="https://patchwork.freedesktop.org/patch/msgid/20171219090110.11153-1-chris@chris-wilson.co.uk">https://patchwork.freedesktop.org/patch/msgid/20171219090110.11153-1-chris@chris-wilson.co.uk</a>
    Reviewed-by: Tvrtko Ursulin <<a href="mailto:tvrtko.ursulin@intel.com">tvrtko.ursulin@intel.com</a>></pre>
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