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Daniel Vetter 326fdffd70 drm: Don't race connector registration 
[ Upstream commit e6e7b48b29 ]

I was under the misconception that the sysfs dev stuff can be fully
set up, and then registered all in one step with device_add. That's
true for properties and property groups, but not for parents and child
devices. Those must be fully registered before you can register a
child.

Add a bit of tracking to make sure that asynchronous mst connector
hotplugging gets this right. For consistency we rely upon the implicit
barriers of the connector->mutex, which is taken anyway, to ensure
that at least either the connector or device registration call will
work out.

Mildly tested since I can't reliably reproduce this on my mst box
here.

Reported-by: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2017-06-17 06:41:53 +02:00
..
bridge drm/bridge: analogix_dp: Add analogix_dp_psr_supported 2016-10-04 08:23:16 +02:00
i2c drm/i2c: tda998x: Register ASoC hdmi-codec and add audio DT binding 2016-09-07 13:10:10 +01:00
ttm drm/ttm, drm/vmwgfx: Relax permission checking when opening surfaces 2017-04-12 12:41:10 +02:00
ati_pcigart.h drm: Move legacy buffer structures to <drm/drm_legacy.h> 2014-09-12 15:28:12 +02:00
drmP.h drm: Don't race connector registration 2017-06-17 06:41:53 +02:00
drm_agpsupport.h drm: Give drm_agp_clear drm_legacy_ prefix 2016-04-27 08:41:34 +02:00
drm_atomic.h drm: Extract drm_plane.[hc] 2016-09-22 00:01:56 -07:00
drm_atomic_helper.h drm/fence: allow fence waiting to be interrupted by userspace 2016-09-12 16:59:15 -04:00
drm_auth.h drm: document drm_auth.c 2016-06-21 22:10:55 +02:00
drm_blend.h drm: Fix plane type uabi breakage 2016-09-22 23:52:12 -07:00
drm_bridge.h drm: Extract drm_bridge.h 2016-09-19 15:04:15 +02:00
drm_cache.h drm: Loongson-3 doesn't fully support wc memory 2016-04-22 10:24:11 +10:00
drm_color_mgmt.h drm/doc: Document color space handling 2016-09-22 00:04:03 -07:00
drm_connector.h drm: prevent double-(un)registration for connectors 2017-06-17 06:41:53 +02:00
drm_crtc.h drm/crtc: constify drm_crtc_index parameter 2016-10-10 17:28:58 +02:00
drm_crtc_helper.h drm/kms-helpers: Extract drm_modeset_helper.[hc] 2016-08-16 16:10:19 +02:00
drm_displayid.h drm/edid: add displayid detailed 1 timings to the modelist. (v1.1) 2016-05-23 11:35:31 +10:00
drm_dp_dual_mode_helper.h drm: Add helper for DP++ adaptors 2016-05-23 11:10:46 +03:00
drm_dp_helper.h drm: Add DP branch device info on debugfs 2016-09-15 14:51:07 +03:00
drm_dp_mst_helper.h drm/dp-mst: Missing kernel doc 2016-07-19 10:31:53 +02:00
drm_edid.h drm: Move all decl for drm_edid.c to drm_edid.h 2016-09-19 15:04:32 +02:00
drm_encoder.h drm: Move a few macros away from drm_crtc.h 2016-09-19 15:03:46 +02:00
drm_encoder_slave.h drm: Constify drm_encoder_slave_funcs 2015-12-15 13:41:17 +01:00
drm_fb_cma_helper.h drm/fb_cma_helper: add suspend helper 2016-06-18 18:33:54 -07:00
drm_fb_helper.h drm/fb-helper: fix sphinx markup for DRM_FB_HELPER_DEFAULT_OPS 2016-10-10 11:19:42 +02:00
drm_fixed.h drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil 2016-02-05 15:23:48 +10:00
drm_flip_work.h drm: flip-work: change drm_flip_work_init prototype 2014-11-15 09:29:14 +10:00
drm_fourcc.h drm: move drm_mode_legacy_fb_format to drm_fourcc.c 2016-08-29 15:37:28 +02:00
drm_framebuffer.h drm: Move a few macros away from drm_crtc.h 2016-09-19 15:03:46 +02:00
drm_gem.h drm/doc: Fix more kerneldoc/sphinx warnings 2016-08-16 16:09:58 +02:00
drm_gem_cma_helper.h drm/cma: Introduce drm_gem_cma_dumb_create_internal() 2014-11-13 13:27:17 +01:00
drm_global.h drm: move ttm global code to core drm 2010-08-04 09:46:06 +10:00
drm_hashtab.h drm: Add a hash-tab rcu-safe API 2012-11-28 18:36:05 +10:00
drm_irq.h drm: Extract&Document drm_irq.h 2016-07-19 10:29:47 +02:00
drm_legacy.h drm: document drm_auth.c 2016-06-21 22:10:55 +02:00
drm_mem_util.h drm,i915: Introduce drm_malloc_gfp() 2016-04-11 17:13:10 +01:00
drm_mipi_dsi.h drm/dsi: Implement DCS set/get display brightness 2016-08-24 13:34:00 +02:00
drm_mm.h drm: Track drm_mm nodes with an interval tree 2016-08-08 10:05:16 +02:00
drm_mode_object.h drm: Extract drm_bridge.h 2016-09-19 15:04:15 +02:00
drm_modes.h drm: Extract drm_bridge.h 2016-09-19 15:04:15 +02:00
drm_modeset_helper.h drm/kms-helpers: Extract drm_modeset_helper.[hc] 2016-08-16 16:10:19 +02:00
drm_modeset_helper_vtables.h drm/atomic-helper: Add atomic_disable CRTC helper callback 2016-08-29 10:21:52 +02:00
drm_modeset_lock.h drm: Implement drm_modeset_lock_all_ctx() 2015-12-02 23:10:59 +01:00
drm_of.h drm: add drm_of_encoder_active_endpoint helpers 2016-02-10 14:19:21 +01:00
drm_os_linux.h drm: Kill DRM_SUSER 2013-12-18 11:35:45 +10:00
drm_panel.h drm/panel: Flesh out kerneldoc 2016-05-06 16:04:48 +02:00
drm_pciids.h drm/radeon: add new OLAND pci id 2015-08-12 12:24:05 -04:00
drm_plane.h drm: Don't force all planes to be added to the state due to zpos 2016-10-26 18:48:05 +02:00
drm_plane_helper.h drm/kms-helpers: Extract drm_modeset_helper.[hc] 2016-08-16 16:10:19 +02:00
drm_property.h drm: Move a few macros away from drm_crtc.h 2016-09-19 15:03:46 +02:00
drm_rect.h drm: Add "prefix" parameter to drm_rect_debug_print() 2015-11-24 11:47:46 +01:00
drm_simple_kms_helper.h drm: simple_kms_helper: Add prepare_fb and cleanup_fb hooks 2016-10-05 15:18:02 +02:00
drm_sysfs.h drm: Enable drm drivers to add drm sysfs devices. 2009-08-19 16:08:51 +10:00
drm_vma_manager.h drm: use drm_file to tag vm-bos 2016-09-19 11:22:08 +02:00
gma_drm.h drm/gma500: Remove unused ioctls 2014-03-17 20:11:57 +01:00
i915_component.h drm/i915: Add get_eld audio component 2015-12-10 13:39:27 +01:00
i915_drm.h drm: avoid "possible bad bitmask?" warning 2016-08-09 22:18:26 +02:00
i915_pciids.h drm/i915: more .is_mobile cleanups for BDW 2017-04-12 12:41:18 +02:00
intel-gtt.h drm/i915: Add support for mapping an object page by page 2016-06-13 10:03:54 +01:00