drm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 9 Jul 2015 21:32:36 +0000 (23:32 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Mon, 10 Aug 2015 11:36:55 +0000 (13:36 +0200)
commita66b2ea224c40cf341ca2096aad225536aa25956
treedba9161a090599d464f548e5cc2d0d2d6a88cbfb
parent8d77a9404ec38be34ffc491a2022022a56e72c90
drm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
drivers/gpu/drm/ast/ast_main.c