Merge tag 'drm-misc-next-2018-11-07' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v4.21, part 1:

UAPI Changes:
- Add syncobj timeline support to drm.

Cross-subsystem Changes:
- Remove shared fence staging in dma-buf's fence object, and allow
  reserving more than 1 fence and add more paranoia when debugging.
- Constify infoframe functions in video/hdmi.

Core Changes:
- Add vkms todo, and a lot of assorted doc fixes.
- Drop transitional helpers and convert drivers to use drm_atomic_helper_shutdown().
- Move atomic state helper functions to drm_atomic_state_helper.[ch]
- Refactor drm selftests, and add new tests.
- DP MST atomic state cleanups.
- Drop EXPORT_SYMBOL from drm leases.
- Lease cleanups and fixes.
- Create render node for vgem.

Driver Changes:
- Fix build failure in imx without fbdev emulation.
- Add rotation quirk for GPD win2 panel.
- Add support for various CDTech panels, Banana Pi Panel, DLC1010GIG,
  Olimex LCD-O-LinuXino, Samsung S6D16D0, Truly NT35597 WQXGA,
  Himax HX8357D, simulated RTSM AEMv8.
- Add dw_hdmi support to rockchip driver.
- Fix YUV support in vc4.
- Fix resource id handling in virtio.
- Make rockchip use dw-mipi-dsi bridge driver, and add dual dsi support.
- Advertise that tinydrm only supports DRM_FORMAT_MOD_LINEAR.
- Convert many drivers to use atomic helpers, and drm_fbdev_generic_setup().
- Add Mali linear tiled formats, and enable them in the Mali-DP driver.
- Add support for H6 DE3 mixer 0, DW HDMI, HDMI PHY and TCON TOP.
- Assorted driver cleanups and fixes.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/be7ebd91-edd9-8fa4-4286-1c57e3165113@linux.intel.com

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 36e8e9cbec52..aa1cef794f9a 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -476,8 +476,6 @@ static void drm_fs_inode_free(struct inode *inode)
  * The initial ref-count of the object is 1. Use drm_dev_get() and
  * drm_dev_put() to take and drop further ref-counts.
  *
- * Note that for purely virtual devices @parent can be NULL.
- *
  * Drivers that do not want to allocate their own device struct
  * embedding &struct drm_device can call drm_dev_alloc() instead. For drivers
  * that do embed &struct drm_device it must be placed first in the overall
@@ -502,6 +500,8 @@ int drm_dev_init(struct drm_device *dev,
 		return -ENODEV;
 	}
 
+	BUG_ON(!parent);
+
 	kref_init(&dev->ref);
 	dev->dev = parent;
 	dev->driver = driver;
@@ -556,9 +556,7 @@ int drm_dev_init(struct drm_device *dev,
 		}
 	}
 
-	/* Use the parent device name as DRM device unique identifier, but fall
-	 * back to the driver name for virtual devices like vgem. */
-	ret = drm_dev_set_unique(dev, parent ? dev_name(parent) : driver->name);
+	ret = drm_dev_set_unique(dev, dev_name(parent));
 	if (ret)
 		goto err_setunique;