[Bug 43367] New: radeon: NULL pointer dereference on switching to dynpm power method

[Bug 43367] New: radeon: NULL pointer dereference on switching to dynpm power method

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=43367

           Summary: radeon: NULL pointer dereference on switching to dynpm
                    power method
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.5-rc2
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: haagch.christoph@googlemail.com
        Regression: Yes


Created an attachment (id=73570)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=73570)
console log of the bug

After changing to dynpm with
# echo dynpm > /sys/class/drm/card0/device/power_method
I immediately get the attached kernel Oops.

Power profiles work fine.

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[Bug 43367] radeon: NULL pointer dereference on switching to dynpm power method

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=43367





--- Comment #1 from Alex Deucher <alexdeucher@gmail.com>  2012-06-13 21:58:48 ---
Created an attachment (id=73588)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=73588)
possible fix

This patch should fix it.

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[Bug 43367] radeon: NULL pointer dereference on switching to dynpm power method

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=43367


Christoph Haag <haagch.christoph@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |CODE_FIX




--- Comment #2 from Christoph Haag <haagch.christoph@googlemail.com>  2012-06-14 19:45:24 ---
The patch fixes it. Thank you. :)

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[Bug 43367] radeon: NULL pointer dereference on switching to dynpm power method

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=43367


Florian Mickler <florian@mickler.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |florian@mickler.org




--- Comment #3 from Florian Mickler <florian@mickler.org>  2012-07-01 09:44:25 ---
A patch referencing this bug report has been merged in Linux v3.5-rc4:

commit 0ec0612a80f957000999c3f7b31a84e3558c719d
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Thu Jun 14 15:54:57 2012 -0400

    drm/radeon: fix regression in dynpm due to multi-ring rework

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