OpenCloudOS-Kernel/include/drm
Christian König 85e26dd510 drm/client: fix circular reference counting issue
We reference dump buffers both by their handle as well as their
object. The problem is now that when anybody iterates over the DRM
framebuffers and exports the underlying GEM objects through DMA-buf
we run into a circular reference count situation.

The result is that the fbdev handling holds the GEM handle preventing
the DMA-buf in the GEM object to be released. This DMA-buf in turn
holds a reference to the driver module which on unload would release
the fbdev.

Break that loop by releasing the handle as soon as the DRM
framebuffer object is created. The DRM framebuffer and the DRM client
buffer structure still hold a reference to the underlying GEM object
preventing its destruction.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: c76f0f7cb5 ("drm: Begin an API for in-kernel clients")
Cc: <stable@vger.kernel.org>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230126102814.8722-1-christian.koenig@amd.com
2023-02-07 09:42:56 +01:00
..
bridge drm: bridge: dw_hdmi: Audio: Add General Parallel Audio (GPA) driver 2022-04-19 18:23:48 +02:00
display Merge tag 'amd-drm-next-6.1-2022-09-08' of https://gitlab.freedesktop.org/agd5f/linux into drm-next 2022-09-12 19:17:41 +10:00
i2c
ttm drm/ttm: fix undefined behavior in bit shift for TTM_TT_FLAG_PRIV_POPULATED 2022-11-02 10:23:07 +01:00
amd_asic_type.h drm/amdgpu: add new asic_type for IP discovery 2021-10-04 15:23:01 -04:00
drm_accel.h accel: add dedicated minor for accelerator devices 2022-11-22 13:14:44 +02:00
drm_aperture.h drm/aperture: Pass DRM driver structure instead of driver name 2021-07-01 11:11:55 +02:00
drm_atomic.h drm/atomic: fix warning of unused variable 2022-06-09 16:09:46 +02:00
drm_atomic_helper.h drm/atomic-helper: Replace drm_atomic_helper_check_crtc_state() 2022-10-08 15:26:55 +02:00
drm_atomic_state_helper.h drm/atomic-helper: Rename drm_atomic_helper_connector_tv_reset to avoid ambiguity 2022-10-10 13:55:47 +02:00
drm_atomic_uapi.h drm: handle kernel fences in drm_gem_plane_helper_prepare_fb v2 2022-05-02 09:01:51 +02:00
drm_audio_component.h ALSA: hda/i915 - fix list corruption with concurrent probes 2020-10-09 16:46:04 +02:00
drm_auth.h drm: clarify usage of drm leases 2021-07-29 09:12:01 +02:00
drm_blend.h
drm_bridge.h drm/vc4: Add explicit declaration of 'drmm_of_get_bridge' 2022-07-21 12:15:56 +02:00
drm_bridge_connector.h
drm_buddy.h drm/selftests: add drm buddy alloc range testcase 2022-02-23 10:44:43 +01:00
drm_cache.h LoongArch: Add writecombine support for drm 2022-06-03 20:09:27 +08:00
drm_client.h drm/client: fix circular reference counting issue 2023-02-07 09:42:56 +01:00
drm_color_mgmt.h
drm_connector.h drm-misc-next for 6.2: 2022-11-22 09:21:17 +10:00
drm_crtc.h drm/crtc: Introduce drmm_crtc_init_with_planes 2022-07-13 10:46:05 +02:00
drm_crtc_helper.h drm/crtc-helper: Add a drm_crtc_helper_atomic_check() helper 2022-10-13 09:17:05 +02:00
drm_damage_helper.h drm/plane: Move drm_plane_enable_fb_damage_clips into core 2021-07-27 12:21:22 +02:00
drm_debugfs.h
drm_debugfs_crc.h
drm_device.h accel: add dedicated minor for accelerator devices 2022-11-22 13:14:44 +02:00
drm_displayid.h drm/displayid: convert to drm_edid 2022-05-13 18:55:13 +03:00
drm_drv.h accel: add dedicated minor for accelerator devices 2022-11-22 13:14:44 +02:00
drm_edid.h drm/edid: move edid load declarations to internal header 2022-10-26 09:53:56 +03:00
drm_encoder.h drm/encoder: Introduce drmm_encoder_init 2022-07-13 10:46:05 +02:00
drm_encoder_slave.h drm: Remove linux/i2c.h from drm_crtc.h 2022-07-05 21:15:23 +03:00
drm_fb_dma_helper.h drm/gem: rename GEM CMA helpers to GEM DMA helpers 2022-08-03 18:31:49 +02:00
drm_fb_helper.h drm/fb-helper: Use a per-driver FB deferred I/O handler 2023-01-24 11:13:08 +01:00
drm_fbdev_generic.h drm/fb-helper: Move generic fbdev emulation into separate source file 2022-11-05 17:12:04 +01:00
drm_file.h accel: add dedicated minor for accelerator devices 2022-11-22 13:14:44 +02:00
drm_fixed.h
drm_flip_work.h
drm_format_helper.h drm/format-helper: Add drm_fb_build_fourcc_list() helper 2022-09-12 09:15:49 +02:00
drm_fourcc.h drm/fourcc: Add drm_format_info.is_color_indexed flag 2022-07-09 15:00:08 +02:00
drm_framebuffer.h drm/fb: Improve drm_framebuffer.offsets documentation 2022-07-09 15:58:52 +02:00
drm_gem.h Merge drm/drm-next into drm-misc-next 2022-10-18 15:00:03 +02:00
drm_gem_atomic_helper.h drm/gem: Implement shadow-plane {begin, end}_fb_access with vmap 2022-11-08 17:10:41 +01:00
drm_gem_dma_helper.h drm/gem: rename struct drm_gem_dma_object.{paddr => dma_addr} 2022-08-03 18:32:27 +02:00
drm_gem_framebuffer_helper.h drm/gem: Ignore color planes that are unused by framebuffer format 2022-05-19 19:25:02 +02:00
drm_gem_shmem_helper.h drm: correct comments 2022-07-21 12:16:10 +02:00
drm_gem_ttm_helper.h dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
drm_gem_vram_helper.h dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
drm_ioctl.h drm: unexport drm_ioctl_permit 2021-08-13 17:50:48 +02:00
drm_lease.h
drm_legacy.h drm: Declare hashtable as legacy 2021-11-30 09:41:28 +01:00
drm_managed.h drm: Add DRM-managed mutex_init() 2022-05-05 09:04:10 +02:00
drm_mipi_dbi.h drm/probe-helper: Add drm_crtc_helper_mode_valid_fixed() 2022-09-12 09:14:26 +02:00
drm_mipi_dsi.h Merge tag 'drm-msm-next-2022-09-22' of https://gitlab.freedesktop.org/drm/msm into drm-next 2022-09-28 11:35:25 +10:00
drm_mm.h drm: Replace kernel.h with the necessary inclusions 2021-12-09 13:46:13 +01:00
drm_mode_config.h drm: Remove drm_mode_config::fb_base 2022-10-19 21:46:16 -04:00
drm_mode_object.h drm/object: Add drm_object_property_get_default_value() function 2022-02-25 17:55:42 +01:00
drm_modes.h drm/modes: Add initializer macro DRM_MODE_INIT() 2022-09-12 09:14:59 +02:00
drm_modeset_helper.h
drm_modeset_helper_vtables.h drm/atomic-helper: Add {begin,end}_fb_access to plane helpers 2022-11-08 17:10:27 +01:00
drm_modeset_lock.h drm/locking: fix drm_modeset_acquire_ctx kernel-doc 2022-01-20 14:41:25 +02:00
drm_module.h drm: Provide platform module-init macro 2022-01-19 18:40:18 +01:00
drm_of.h drm: of: Mark empty drm_of_get_data_lanes_count and drm_of_get_data_lanes_ep static 2022-06-12 16:07:05 +02:00
drm_panel.h drm/panel: drop DSC pps pointer 2022-09-18 09:38:06 -07:00
drm_pciids.h
drm_plane.h drm/plane: Allocate planes with drm_universal_plane_alloc() 2022-09-20 09:41:06 +02:00
drm_plane_helper.h drm/plane-helper: Add the missing declaration of drm_atomic_state 2022-12-16 10:23:11 +01:00
drm_prime.h dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
drm_print.h drm_print: add _ddebug descriptor to drm_*dbg prototypes 2022-09-24 15:02:02 +02:00
drm_privacy_screen_consumer.h drm/privacy-screen: Add notifier support (v2) 2021-10-14 13:12:25 +02:00
drm_privacy_screen_driver.h drm/privacy_screen: Add drvdata in drm_privacy_screen 2022-01-10 12:17:37 +01:00
drm_privacy_screen_machine.h drm/privacy-screen: Add X86 specific arch init code 2021-10-14 13:12:24 +02:00
drm_probe_helper.h drm/probe-helper: Add drm_crtc_helper_mode_valid_fixed() 2022-09-12 09:14:26 +02:00
drm_property.h drm: document drm_property_enum.value for bitfields 2021-07-26 10:08:22 +02:00
drm_rect.h drm/rect: Add DRM_RECT_INIT() macro 2022-06-27 13:45:48 +02:00
drm_self_refresh_helper.h
drm_simple_kms_helper.h drm/atomic-helper: Add {begin,end}_fb_access to plane helpers 2022-11-08 17:10:27 +01:00
drm_syncobj.h
drm_sysfs.h drm/sysfs: introduce drm_sysfs_connector_hotplug_event 2021-11-02 14:27:06 +01:00
drm_util.h
drm_utils.h
drm_vblank.h drm/vblank: Document drm_crtc_vblank_restore constraints 2021-02-10 12:38:55 +01:00
drm_vblank_work.h
drm_vma_manager.h drm/drm_vma_manager: Add drm_vma_node_allow_once() 2023-01-19 14:16:55 +01:00
drm_writeback.h drm: introduce drm_writeback_connector_init_with_encoder() API 2022-05-02 02:12:59 +03:00
gma_drm.h
gpu_scheduler.h Merge tag 'amd-drm-next-6.2-2022-11-18' of https://gitlab.freedesktop.org/agd5f/linux into drm-next 2022-11-22 13:41:11 +10:00
gud.h drm/gud: Add GUD_PIXEL_FORMAT_RGB888 2021-10-04 12:06:14 +02:00
i915_component.h drm/i915/pxp: Define PXP component interface 2021-10-04 13:09:53 -04:00
i915_drm.h drm/i915: include uapi/drm/i915_drm.h directly where needed 2022-03-17 20:06:04 +02:00
i915_mei_hdcp_interface.h drm/display: Move HDCP helpers into display-helper module 2022-04-25 11:19:36 +02:00
i915_pciids.h drm/i915: Add new ADL-S pci id 2022-08-26 05:46:23 -07:00
i915_pxp_tee_interface.h mei: pxp: add command streamer API to the PXP driver 2022-10-03 11:29:11 -07:00
intel-gtt.h agp/intel: Rename intel-gtt symbols 2022-06-22 15:52:55 -07:00
intel_lpe_audio.h
spsc_queue.h
task_barrier.h