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<body><span class="vcard"><a class="email" href="mailto:bin.a.xu@intel.com" title="xubin <bin.a.xu@intel.com>"> <span class="fn">xubin</span></a>
</span> changed
<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [ HSW Bisected ] VGA was white screen when resume in test S3 with 3pipe"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89872">bug 89872</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;">Keywords</td>
<td>bisect_pending
</td>
<td>bisected
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>ASSIGNED
</td>
</tr>
<tr>
<td style="text-align:right;">Summary</td>
<td>[ HSW Regression ] VGA was white screen when resume in test S3 with 3pipe
</td>
<td>[ HSW Bisected ] VGA was white screen when resume in test S3 with 3pipe
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [ HSW Bisected ] VGA was white screen when resume in test S3 with 3pipe"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89872#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [ HSW Bisected ] VGA was white screen when resume in test S3 with 3pipe"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89872">bug 89872</a>
from <span class="vcard"><a class="email" href="mailto:bin.a.xu@intel.com" title="xubin <bin.a.xu@intel.com>"> <span class="fn">xubin</span></a>
</span></b>
<pre>Bisect shows:e81918499f060fe35ee12298e66fbfc2c6159b19 is the first bad commit.
commit e81918499f060fe35ee12298e66fbfc2c6159b19
Author: Mika Kuoppala <<a href="mailto:mika.kuoppala@linux.intel.com">mika.kuoppala@linux.intel.com</a>>
AuthorDate: Fri Mar 13 15:21:53 2015 +0200
Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
CommitDate: Fri Mar 13 18:34:45 2015 +0100
drm/i915: Fix vmap_batch page iterator overrun
vmap_batch() calculates amount of needed pages for the mapping
we are going to create. And it uses this page count as an
argument for the for_each_sg_pages() macro. The macro takes the number
of sg list entities as an argument, not the page count. So we ended
up iterating through all the pages on the mapped object, corrupting
memory past the smaller pages[] array.
Fix this by bailing out when we have enough pages.
This regression has been introduced in
commit 17cabf571e50677d980e9ab2a43c5f11213003ae
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Wed Jan 14 11:20:57 2015 +0000
drm/i915: Trim the command parser allocations
Cc: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Signed-off-by: Mika Kuoppala <<a href="mailto:mika.kuoppala@intel.com">mika.kuoppala@intel.com</a>>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>></pre>
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