drm/nv50/crtc: Bail out if FB is not bound to crtc
authorEmil Velikov <emil.l.velikov@gmail.com>
Sun, 21 Aug 2011 21:48:12 +0000 (22:48 +0100)
committerBen Skeggs <bskeggs@redhat.com>
Fri, 9 Sep 2011 07:23:56 +0000 (17:23 +1000)
Fixes possbile NULL pointer dereference
Resolves 'kernel crash in nv50_crtc_do_mode_set_base during shutdown'
https://bugs.freedesktop.org/show_bug.cgi?id=40005

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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