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linux/drivers/gpu/drm/i915
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Daniel Vetter b838cbee0d drm/i915: Remove bogus locking check in the hangcheck code 
You can _never_ assert that a lock is not held, except in some very
restricted corner cases where it's guranteed that your code is running
single-threade (e.g. driver load before you've published any pointers
leading to that lock).

In addition the early return breaks a bunch of testcases since with
highly concurrent hangcheck stress tests the reset fails to work and
the test doesn't recover and time out.

This regression has been introduced in

commit b8d24a0656
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date:   Wed Jan 28 17:03:14 2015 +0200

    drm/i915: Remove nested work in gpu error handling

Aside: It is possible to check whether a given task doesn't hold a
lock, but only when lockdep is enabled, using the lockdep_assert_held
stuff.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88908
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
 		2015-02-03 17:13:04 +01:00
..
Kconfig drm/i915/dsi: add drm mipi dsi host support 2015-01-29 16:51:39 +01:00
Makefile drm/i915/dsi: remove intel_dsi_cmd.c and the unused functions therein 2015-01-29 16:57:14 +01:00
dvo.h
…
dvo_ch7xxx.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo_ch7017.c
…
dvo_ivch.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo_ns2501.c drm/i915: Check pixel clock in ns2501 mode_valid hook 2014-09-03 11:05:21 +02:00
dvo_sil164.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
dvo_tfp410.c drm/i915: Remove spurious semicolons 2014-04-09 21:54:33 +02:00
i915_cmd_parser.c drm/i915: Add GPGPU_THREADS_DISPATCHED to the register whitelist 2014-12-16 10:39:10 +01:00
i915_debugfs.c drm/i915: Remove nested work in gpu error handling 2015-01-29 18:03:07 +01:00
i915_dma.c drm/i915: Remove nested work in gpu error handling 2015-01-29 18:03:07 +01:00
i915_drv.c drm/i915: Convert hangcheck from a timer into a delayed work item 2015-01-28 17:22:12 +01:00
i915_drv.h drm/i915: Update DRIVER_DATE to 20150130 2015-01-30 22:37:54 +01:00
i915_gem.c Revert "drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES" 2015-01-28 17:22:28 +01:00
i915_gem_batch_pool.c drm/i915: Mark shadow batch buffers as purgeable 2014-12-16 10:39:09 +01:00
i915_gem_context.c Merge tag 'topic/i915-hda-componentized-2015-01-12' into drm-intel-next-queued 2015-01-12 23:07:46 +01:00
i915_gem_debug.c drm/i915: prefer struct drm_i915_private to drm_i915_private_t 2014-03-31 15:34:21 +02:00
i915_gem_dmabuf.c dma-buf: use reservation objects 2014-07-08 13:03:20 -07:00
i915_gem_evict.c drm/i915: Add some extra guards in evict_vm 2015-01-06 09:07:59 +01:00
i915_gem_execbuffer.c drm/i915: Specify bsd rings through exec flag 2015-01-27 09:51:05 +01:00
i915_gem_gtt.c drm/i915: Organize bind_vma funcs 2014-12-17 18:23:12 +01:00
i915_gem_gtt.h drm/i915: Infrastructure for supporting different GGTT views per object 2014-12-15 11:25:04 +01:00
i915_gem_render_state.c drm/i915: Remove obsolete seqno parameter from 'i915_add_request' 2014-12-03 09:35:19 +01:00
i915_gem_render_state.h drm/i915/bdw: Render state init for Execlists 2014-09-03 11:04:52 +02:00
i915_gem_stolen.c drm/i915: Don't complain about stolen conflicts on gen3 2014-12-10 11:11:28 +02:00
i915_gem_tiling.c drm/i915: Replace last_[rwf]_seqno with last_[rwf]_req 2014-12-03 09:35:14 +01:00
i915_gem_userptr.c drm/i915: Do not leak pages when freeing userptr objects 2014-09-29 15:31:01 +02:00
i915_gpu_error.c drm/i915: Removed duplicate members from submit_request 2015-01-27 09:50:52 +01:00
i915_ioc32.c drm/i915: remove redundant #ifdef CONFIG_COMPAT 2014-10-24 16:34:07 +02:00
i915_irq.c drm/i915: Remove bogus locking check in the hangcheck code 2015-02-03 17:13:04 +01:00
i915_params.c drm/i915: Add i915.nuclear_pageflip command line param to force atomic (v4) 2015-01-27 09:57:34 +01:00
i915_reg.h drm/i915/skl: Enabling PSR on Skylake 2015-01-28 17:22:29 +01:00
i915_suspend.c Merge tag 'topic/i915-hda-componentized-2015-01-12' into drm-intel-next-queued 2015-01-12 23:07:46 +01:00
i915_sysfs.c drm/i915: Use intel_gpu_freq() and intel_freq_opcode() 2015-01-27 09:51:17 +01:00
i915_trace.h drm/i915: Additional request structure tracing 2014-12-06 01:46:27 +01:00
i915_trace_points.c
…
i915_ums.c drm/i915: don't save/restore backlight hist ctl registers 2014-11-14 10:29:28 +01:00
intel_acpi.c
…
intel_atomic.c drm/i915: Add crtc state duplication/destruction functions 2015-01-27 09:57:18 +01:00
intel_atomic_plane.c drm/i915: Switch plane properties to full atomic helper. 2015-01-27 09:57:25 +01:00
intel_audio.c drm/i915: Make intel_crtc->config a pointer 2015-01-27 09:50:50 +01:00
intel_bios.c Revert "drm/i915: Parsing LFP brightness control from VBT" 2015-01-07 09:45:38 +01:00
intel_bios.h Revert "drm/i915: Parsing LFP brightness control from VBT" 2015-01-07 09:45:38 +01:00
intel_crt.c drm/i915: Add atomic_get_property entrypoint for connectors (v2) 2015-01-27 09:57:10 +01:00
intel_ddi.c drm/i915: Use pipe_config's cpu_transcoder for reading encoder hw state 2015-01-30 19:38:43 +01:00
intel_display.c drm/i915: Split shared dpll setup out of __intel_set_mode() 2015-01-30 17:31:30 +01:00
intel_dp.c drm/i915: Add atomic_get_property entrypoint for connectors (v2) 2015-01-27 09:57:10 +01:00
intel_dp_mst.c drm/i915: Use pipe_config's cpu_transcoder for reading encoder hw state 2015-01-30 19:38:43 +01:00
intel_drv.h drm/i915: Add crtc state duplication/destruction functions 2015-01-27 09:57:18 +01:00
intel_dsi.c drm/i915/dsi: remove intel_dsi_cmd.c and the unused functions therein 2015-01-29 16:57:14 +01:00
intel_dsi.h drm/i915/dsi: add drm mipi dsi host support 2015-01-29 16:51:39 +01:00
intel_dsi_cmd.h drm/i915/dsi: move dpi_send_cmd() to intel_dsi.c and make it static 2015-01-29 16:56:47 +01:00
intel_dsi_panel_vbt.c drm/i915/dsi: remove intel_dsi_cmd.c and the unused functions therein 2015-01-29 16:57:14 +01:00
intel_dsi_pll.c drm/i915: Use DSI Pll1 for enabling MIPI DSI on Port C 2014-12-10 17:47:21 +01:00
intel_dvo.c drm/i915: Add atomic_get_property entrypoint for connectors (v2) 2015-01-27 09:57:10 +01:00
intel_fbc.c drm/i915: Move rotation from intel_plane to drm_plane_state 2015-01-27 09:51:18 +01:00
intel_fbdev.c drm/i915: Rename plane_config to initial_plane_config 2015-01-27 09:51:04 +01:00
intel_fifo_underrun.c drivers: gpu: drm: i915: intel_fifo_underrun.c: Fix a typo in comment 2015-01-27 10:30:01 +01:00
intel_frontbuffer.c drm/i915: DRRS calls based on frontbuffer 2015-01-27 09:51:15 +01:00
intel_hdmi.c drm/i915: Add atomic_get_property entrypoint for connectors (v2) 2015-01-27 09:57:10 +01:00
intel_i2c.c drm/i915: Kill duplicated cdclk readout code from i2c 2014-07-07 11:27:52 +02:00
intel_lrc.c drm/i915: Fix a use-after-free in intel_execlists_retire_requests 2015-01-30 19:38:13 +01:00
intel_lrc.h drm/i915: Subsume intel_ctx_submit_request in to drm_i915_gem_request 2015-01-27 09:50:53 +01:00
intel_lvds.c drm/i915: Add atomic_get_property entrypoint for connectors (v2) 2015-01-27 09:57:10 +01:00
intel_modes.c
…
intel_opregion.c ACPI / i915: Update the condition to ignore firmware backlight change request 2014-09-30 01:11:18 +02:00
intel_overlay.c drm/i915: Make intel_crtc->config a pointer 2015-01-27 09:50:50 +01:00
intel_panel.c drm/i915: Embedded struct drm_crtc_state in intel_crtc_state 2015-01-27 09:50:48 +01:00
intel_pm.c drm/i915: Handle CHV in vlv_set_rps_idle() 2015-01-30 17:09:39 +01:00
intel_psr.c drm/i915/skl: Enabling PSR on Skylake 2015-01-28 17:22:29 +01:00
intel_renderstate.h drm/i915 Add golden context support for Gen9 2014-11-04 14:04:55 +01:00
intel_renderstate_gen6.c drm/i915: Add headers to the various render state 2014-12-10 17:47:23 +01:00
intel_renderstate_gen7.c drm/i915: Add headers to the various render state 2014-12-10 17:47:23 +01:00
intel_renderstate_gen8.c drm/i915: Add headers to the various render state 2014-12-10 17:47:23 +01:00
intel_renderstate_gen9.c drm/i915: Add headers to the various render state 2014-12-10 17:47:23 +01:00
intel_ringbuffer.c drm/i915: Change CHV WIZ hashing mode to 16x4 2015-01-27 09:51:10 +01:00
intel_ringbuffer.h drm/i915: Remove FIXME_lrc_ctx backpointer 2015-01-27 09:50:53 +01:00
intel_runtime_pm.c drm/i915/skl: Adding power domains for AUX controllers 2015-01-27 09:50:58 +01:00
intel_sdvo.c drm/i915: Add atomic_get_property entrypoint for connectors (v2) 2015-01-27 09:57:10 +01:00
intel_sdvo_regs.h
…
intel_sideband.c drm/i915: Increase the range of sideband address. 2015-01-27 09:50:43 +01:00
intel_sprite.c drm/i915: Switch plane properties to full atomic helper. 2015-01-27 09:57:25 +01:00
intel_tv.c drm/i915: Add atomic_get_property entrypoint for connectors (v2) 2015-01-27 09:57:10 +01:00
intel_uncore.c drm/i915: Don't do posting reads on getting forcewake 2015-01-30 17:16:51 +01:00