Hi,
> It turns out that the bochs and vbox drivers automatically reserved and
> unreserved the BO from within their pin and unpin functions. The other
> drivers; ast, hibmc and mgag200; performed reservation explicitly. With the
> GEM VRAM conversion, automatic BO reservation within pin and unpin functions
> accidentally got lost. So for bochs and vbox, ttm_bo_validate() worked on
> unlocked BOs.
>
> This patch set fixes the problem by adding automatic reservation to the
> implementation of drm_gem_vram_{pin,unpin,push_to_system}() to fix bochs
> and vbox. It removes explicit BO reservation around the pin, unpin and
> push-to-system calls in the ast, hibmc and mgag200 drivers.
>
> The only exception is the cursor handling of mgag200. In this case, the
> mgag200 driver now calls drm_gem_vram_{pin,unpin}_reserved(), which works
> with reserved BOs. The respective code should be refactored in a future
> patch to work with the regular pin and unpin functions.
Looks good, pushed to drm-misc-next.
thanks,
Gerd
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