We moved minor deallocation to drm_dev_free() in:
commit 8f6599da8e772fa8de54cdf98e9e03cbaf3946da
Author: David Herrmann <dh.herrmann@xxxxxxxxx>
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:
commit 5bdebb183c9702a8c57a01dff09337be3de337a6
Author: Dave Airlie <airlied@xxxxxxxxxx>
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@xxxxxxxxx>
Reported-by: Daniel Vetter <daniel@xxxxxxxx>
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
---
drivers/gpu/drm/drm_stub.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index c200136..f53d524 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -338,7 +338,7 @@ err_idr:
*/
static void drm_unplug_minor(struct drm_minor *minor)
{
- if (!minor || !device_is_registered(minor->kdev))
+ if (!minor || !minor->kdev)
return;
#if defined(CONFIG_DEBUG_FS)
--
1.8.4.2
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