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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW]igt/module_reload randomly causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65880#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW]igt/module_reload randomly causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65880">bug 65880</a>
from <span class="vcard"><a class="email" href="mailto:yangweix.shui@intel.com" title="shui yangwei <yangweix.shui@intel.com>"> <span class="fn">shui yangwei</span></a>
</span></b>
<pre>bisect shows: commit eda63ffb906c2fb3b609a0e87aeb63c0f25b9e6b
is the first bad commit.
commit eda63ffb906c2fb3b609a0e87aeb63c0f25b9e6b
Author: Ben Widawsky <<a href="mailto:ben@bwidawsk.net">ben@bwidawsk.net</a>>
AuthorDate: Tue May 28 19:22:26 2013 -0700
Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
CommitDate: Fri May 31 20:54:16 2013 +0200
drm/i915: Add PM regs to pre/post install
At the moment, these values are wiped out anyway by the rps
enable/disable. That will be changed in the next patch though.
v2: Add post install setup to address issue found by Damien in the next
patch.
replaced
WARN_ON(dev_priv->rps.pm_iir != 0);
with rps.pm_iir = 0;
With the v2 of this patch and the deferred pm enabling (which changed
since the original patches) we're now able to get PM interrupts before
we've brought up enabled rps. At this point in boot, we don't want to do
anything about it, so we simply ignore it. Since writing the original
assertion, the code has changed quite a bit, and I believe removing this
assertion is perfectly safe.
Signed-off-by: Ben Widawsky <<a href="mailto:ben@bwidawsk.net">ben@bwidawsk.net</a>>
Reviewed-by: Damien Lespiau <<a href="mailto:damien.lespiau@intel.com">damien.lespiau@intel.com</a>>
[danvet: I don't agree with the justification to drop the WARN and
added a FIXME to that effect.]
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>></pre>
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