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linux/include/drm
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Matthew Brost f9a4f28a4f drm/sched: Increment job count before swapping tail spsc queue 
commit 8af39ec5cf upstream.

A small race exists between spsc_queue_push and the run-job worker, in
which spsc_queue_push may return not-first while the run-job worker has
already idled due to the job count being zero. If this race occurs, job
scheduling stops, leading to hangs while waiting on the job’s DMA
fences.

Seal this race by incrementing the job count before appending to the
SPSC queue.

This race was observed on a drm-tip 6.16-rc1 build with the Xe driver in
an SVM test case.

Fixes: 1b1f42d8fd ("drm: move amd_gpu_scheduler into common location")
Fixes: 27105db6c6 ("drm/amdgpu: Add SPSC queue to scheduler.")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://lore.kernel.org/r/20250613212013.719312-1-matthew.brost@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-07-17 18:32:08 +02:00
..
bridge drm: bridge: dw_hdmi: Audio: Add General Parallel Audio (GPA) driver 2022-04-19 18:23:48 +02:00
display drm/dp_mst: Fix drm RAD print 2025-04-10 14:33:32 +02:00
i2c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ttm drm/ttm: Make sure the mapped tt pages are decrypted when needed 2024-12-14 19:54:54 +01:00
amd_asic_type.h drm/amdgpu: add new asic_type for IP discovery 2021-10-04 15:23:01 -04:00
drm_aperture.h drm/aperture: Remove primary argument 2023-08-30 16:10:57 +02:00
drm_atomic.h drm/atomic: clarify the rules around drm_atomic_state->allow_modeset 2025-06-04 14:40:18 +02:00
drm_atomic_helper.h drm: drm_atomic_helper: Add a new helper to deal with the writeback connector validation 2022-09-05 20:12:16 -01:00
drm_atomic_state_helper.h drm/bridge: Add a drm_bridge_state object 2020-01-31 16:00:21 +01:00
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: Add per-plane pixel blend mode property 2018-08-24 17:31:37 +01:00
drm_bridge.h drm/bridge: Fix typo in post_disable() description 2024-01-25 15:27:32 -08:00
drm_bridge_connector.h drm: Add helper to create a connector for a chain of bridges 2020-02-26 13:31:41 +02:00
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 dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
drm_color_mgmt.h drm: using mul_u32_u32() requires linux/math64.h 2024-02-05 20:13:00 +00:00
drm_connector.h drm/edid: add a quirk for two LG monitors to get them to work on 10bpc 2022-12-31 13:32:59 +01:00
drm_crtc.h drm/crtc: Introduce drmm_crtc_init_with_planes 2022-07-13 10:46:05 +02:00
drm_crtc_helper.h drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
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: remove checks for return value of drm_debugfs functions. 2020-03-18 17:32:20 +01:00
drm_debugfs_crc.h drm/crc: Only report a single overflow when a CRC fd is opened 2018-07-06 14:57:03 +02:00
drm_device.h drm: Declare hashtable as legacy 2021-11-30 09:41:28 +01:00
drm_displayid.h drm/displayid: convert to drm_edid 2022-05-13 18:55:13 +03:00
drm_drv.h drm: Return error codes from struct drm_driver.gem_create_object 2021-12-02 11:12:39 +01:00
drm_edid.h drm/edid: Handle EDID 1.4 range descriptor h/vfreq offsets 2022-09-02 16:38:51 +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: Remove linux/fb.h from drm_crtc.h 2022-07-05 21:14:02 +03:00
drm_file.h drm: Remove the drm_get_unmapped_area() helper 2022-08-04 11:39:27 -04:00
drm_fixed.h drm: Fix drm_fixp2int_round() making it add 0.5 2024-03-26 18:21:00 -04:00
drm_flip_work.h drm/kms-helpers: Use recommened kerneldoc for struct member refs 2017-01-25 16:18:57 +01:00
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 drm/msm/gem: Prevent blocking within shrinker loop 2023-03-22 13:33:39 +01:00
drm_gem_atomic_helper.h dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
drm_legacy.h drm: Declare hashtable as legacy 2021-11-30 09:41:28 +01:00
drm_managed.h drm: fix drmm_mutex_init() 2023-05-30 14:03:20 +01:00
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 drm/mipi-dsi: Fix theoretical int overflow in mipi_dsi_dcs_write_seq() 2024-08-03 08:49:10 +02:00
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 allow_fb_modifiers 2022-01-31 21:45:24 +01:00
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: remove drmP.h from drm_modeset_helper.h 2019-02-07 21:48:34 +01:00
drm_modeset_helper_vtables.h drm/probe-helper: warn about negative .get_modes() 2024-04-03 15:19:36 +02:00
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/radeon: change SPDX identifier to MIT 2018-10-15 16:16:12 -05:00
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 2023-01-12 12:02:52 +01:00
drm_prime.h dma-buf-map: Rename to iosys-map 2022-02-07 16:35:35 -08:00
drm_print.h drm/printer: Allow NULL data in devcoredump printer 2024-10-17 15:21:46 +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/atomic: fix self-refresh helpers crtc state dereference 2019-11-06 13:00:21 -05:00
drm_simple_kms_helper.h drm/simple-kms: Support custom CRTC state 2021-08-08 20:14:08 +02:00
drm_syncobj.h drm/syncobj: add new drm_syncobj_add_point interface v4 2019-04-01 12:05:53 +02:00
drm_sysfs.h drm/sysfs: introduce drm_sysfs_connector_hotplug_event 2021-11-02 14:27:06 +01:00
drm_util.h drm: Move EXPORT_SYMBOL_FOR_TESTS_ONLY under a separate Kconfig 2019-11-07 21:22:15 +00:00
drm_utils.h drm: export drm_timeout_abs_to_jiffies 2019-03-07 12:00:30 -06:00
drm_vblank.h drm/vblank: Document drm_crtc_vblank_restore constraints 2021-02-10 12:38:55 +01:00
drm_vblank_work.h drm/vblank: Add vblank works 2020-07-16 18:16:31 -04:00
drm_vma_manager.h drm/drm_vma_manager: Add drm_vma_node_allow_once() 2023-02-01 08:34:42 +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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
gpu_scheduler.h gpu/drm: Eliminate DRM_SCHED_PRIORITY_UNSET 2023-11-08 14:11:00 +01:00
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/dg2: Drop one PCI ID 2023-05-11 23:03:07 +09:00
i915_pxp_tee_interface.h drm/i915/pxp: Define PXP component interface 2021-10-04 13:09:53 -04:00
intel-gtt.h agp/intel: Rename intel-gtt symbols 2022-06-22 15:52:55 -07:00
intel_lpe_audio.h ALSA: x86: Register multiple PCM devices for the LPE audio card 2017-05-03 16:24:00 +03:00
spsc_queue.h drm/sched: Increment job count before swapping tail spsc queue 2025-07-17 18:32:08 +02:00
task_barrier.h drm: Add Reusable task barrier. 2019-12-18 16:09:12 -05:00