[Bug 77511] [ILK/SNB/IVB/BYT/HSW/BDW]igt/drv_module_reload cause system random hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77511

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #2 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to comment #1)
> Can you please bisect where this regression has been introduced?
> 
> Both the module reload hang issue and the backtrace from
> 
> [  104.889887] WARNING: CPU: 0 PID: 3807 at drivers/gpu/drm/drm_crtc.c:4684
> drm_mode_config_cleanup+0x114/0x1a0 [drm]()
> 
> separately since they might be different bugs.

About [  104.889887] WARNING: CPU: 0 PID: 3807 at
drivers/gpu/drm/drm_crtc.c:4684
drm_mode_config_cleanup+0x114/0x1a0 [drm]()

4c6baa595f4e8516bb9cf0081765f90856aa2fe3 is the first bad commit
commit 4c6baa595f4e8516bb9cf0081765f90856aa2fe3
Author: Jesse Barnes <jbarnes at virtuousgeek.org>
Date:   Fri Mar 7 08:57:50 2014 -0800

    drm/i915: get_plane_config support for ILK+ v3

    This should allow BIOS fb inheritance to work on ILK+ machines too.

    v2: handle tiled BIOS fbs (Kristian)
        split out common bits (Jesse)
    v3: alloc fb obj out in _init

    Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
    Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

:040000 040000 be6fd58e34c1ca582a123f0d47baaac24cd6ede1
c6d54592168e65908c1bdc65727150d3df1829ae M      drivers


About system random hang, we didn't met it during bisection. We will further
investigate it later.

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