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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW Regression 3.19.2]igt/drm_read/short-buffer-block fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89737">89737</a>
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<th>Summary</th>
<td>[HSW Regression 3.19.2]igt/drm_read/short-buffer-block fails
</td>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>high
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=114567" name="attach_114567" title="dmesg">attachment 114567</a> <a href="attachment.cgi?id=114567&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: Yes
it fails on 3.19.2, works well 3.18.0
Non-working platforms: HSW
==kernel==
--------------------------
commit 660613d1a4e94144490850b6c3d350331860fac4
Author: Greg Kroah-Hartman <<a href="mailto:gregkh@linuxfoundation.org">gregkh@linuxfoundation.org</a>>
Date: Wed Mar 18 14:11:52 2015 +0100
Linux 3.19.2
==Bug detailed description==
-----------------------------
It fails on 3.19.2, works well 3.18.0 and the latest drm-intel-nightly kernel.
igt@drm_read@short-buffer-nonblock also fails.
output:
IGT-Version: 1.10-ge7d26df (x86_64) (Linux: 3.19.2_v3.19.2+ x86_64)
Test assertion failure function test_short_buffer, file drm_read.c:148:
Failed assertion: read(fd, buffer, 4) == 0
Last errno: 11, Resource temporarily unavailable
error: -1 != 0
Subtest short-buffer-block failed.
**** DEBUG ****
Test assertion failure function test_short_buffer, file drm_read.c:148:
Failed assertion: read(fd, buffer, 4) == 0
Last errno: 11, Resource temporarily unavailable
error: -1 != 0
**** END ****
Subtest short-buffer-block: FAIL (0.000s)
Reproduce steps:
-------------------------
1. ./drm_read --run-subtest short-buffer-block</pre>
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