[PATCH 4/5] drm/omapdrm: Fix mm_list locking

[Tomi Valkeinen]

On 27/03/18 11:23, Daniel Vetter wrote:
> - None of the list walkings where protected.
> 
> - Switch to a mutex since the list walking could potentially take a
>   very long time.
> 
> Only thing we need to be careful with here is that while we walk the
> list we cant unreference any gem objects, since the final unref would
> result in a recursive deadlock. But the only functions that walk the
> list is the device resume and debugfs dumping, so all safe.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Tomi Valkeinen <tomi.valkeinen at ti.com>
> ---
>  drivers/gpu/drm/omapdrm/omap_debugfs.c |  2 ++
>  drivers/gpu/drm/omapdrm/omap_drv.c     |  2 +-
>  drivers/gpu/drm/omapdrm/omap_drv.h     |  2 +-
>  drivers/gpu/drm/omapdrm/omap_gem.c     | 11 +++++++----
>  4 files changed, 11 insertions(+), 6 deletions(-)

Thanks, I'll pick this to omapdrm branch.

 Tomi

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