drm: Refactor drop/set master code a bit
File open/set_maseter ioctl and file close/drop_master ioctl share the same master handling code. Extract it. Note that vmwgfx's master_set callback needs to know whether the master is a new one or has been used already, so thread this through. On the close/drop side a similar parameter existed, but wasnt used. Drop it to simplify the flow. v2: Try to make it not leak so much (Emil). v3: Send out the right version ... Cc: Emil Velikov <emil.l.velikov@gmail.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk> Reviewed-by: NEmil Velikov <emil.l.velikov@gmail.com> Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1466511638-9885-1-git-send-email-daniel.vetter@ffwll.ch
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