drm: check for !kdev in drm_unplug_minor()
We moved minor deallocation to drm_dev_free() in: commit8f6599da8e
Author: David Herrmann <dh.herrmann@gmail.com> Date: Sun Oct 20 18:55:45 2013 +0200 drm: delay minor destruction to drm_dev_free() However, this causes a call to drm_unplug_minor(), which should just do nothing as drm_dev_unregister() already called this. But a separate patch caused kdev lifetime changes: commit5bdebb183c
Author: Dave Airlie <airlied@redhat.com> Date: Fri Oct 11 14:07:25 2013 +1000 drm/sysfs: sort out minor and connector device object lifetimes. Thus making our dev_is_registered() call useles (and even segfault if it is NULL). Replace it with a simple !kdev test and we're fine. Reported-by: Huax Lu <huax.lu@intel.com> Reported-by: Daniel Vetter <daniel@ffwll.ch> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71208 Tested-by: lu hua <huax.lu@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Dave Airlie <airlied@gmail.com>
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@ -338,7 +338,7 @@ err_idr:
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*/
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static void drm_unplug_minor(struct drm_minor *minor)
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{
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if (!minor || !device_is_registered(minor->kdev))
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if (!minor || !minor->kdev)
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return;
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#if defined(CONFIG_DEBUG_FS)
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