This is breaks the abi slightly, but allows preserving the framebuffer contents 
across processes.
Any system compositor or fbdev should take care of resetting the planes and 
mode anyway.

Restoring a framebuffer requires a call to getfb, which checks for
CAP_SYS_ADMIN, DRM_MASTER or access to the control file. Any of those
require privileges, so this shouldn't be a security issue.

Maarten Lankhorst (2):
  drm/core: Preserve the framebuffer after removing it.
  drm/core: Preserve the fb id on close.

 drivers/gpu/drm/drm_crtc.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

-- 
2.1.0

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