AuxXxilium/linux_dsm_epyc7002
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7015f127d8
linux_dsm_epyc7002/drivers/gpu/drm/i915
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Chris Wilson 7015f127d8 drm/i915/display: Remove useless but deadly local 
Beware dereferencing the NULL pointer prior to checking for its
existence.

<1>[    3.324694] BUG: kernel NULL pointer dereference, address: 0000000000000000
<1>[    3.324696] #PF: supervisor read access in kernel mode
<4>[    3.324704] hardirqs last  enabled at (751): [<ffffffff812a4f77>] d_lookup+0x57/0xa0
<1>[    3.324709] #PF: error_code(0x0000) - not-present page
<4>[    3.324716] hardirqs last disabled at (752): [<ffffffff8125a1b9>] __slab_alloc.isra.89.constprop.94+0x19/0x70
<4>[    3.324720] softirqs last  enabled at (402): [<ffffffff81e00385>] __do_softirq+0x385/0x47f
<6>[    3.324725] PGD 0 P4D 0
<4>[    3.324733] softirqs last disabled at (395): [<ffffffff810bab6a>] irq_exit+0xba/0xc0
<4>[    3.324762] Oops: 0000 [#1] PREEMPT SMP PTI
<4>[    3.324768] CPU: 0 PID: 380 Comm: systemd-udevd Not tainted 5.6.0-rc7-CI-CI_DRM_8189+ #1
<4>[    3.324776] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
<4>[    3.324840] RIP: 0010:intel_read_infoframe+0x3a/0x170 [i915]
<4>[    3.324848] Code: 65 48 8b 04 25 28 00 00 00 48 89 44 24 20 31 c0 83 f9 0a 77 12 ba 01 00 00 00 48 d3 e2 f7 c2 c0 05 00 00 48 0f 45 c7 83 fb 03 <4c> 8b 20 0f 84 f2 00 00 00 83 fb 0a 0f 84 f3 00 00 00 83 fb 07 0f
<4>[    3.324865] RSP: 0018:ffffc900005438b0 EFLAGS: 00010212
<4>[    3.324871] RAX: 0000000000000000 RBX: 0000000000000082 RCX: 0000000000000001
<4>[    3.324879] RDX: 0000000000000002 RSI: ffff8883f8309000 RDI: ffff8883f80cbe00
<4>[    3.324887] RBP: ffff8883f8309b34 R08: 000000000000000e R09: 0000000000000001
<4>[    3.324894] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8883f7ac0000
<4>[    3.324901] R13: ffff8883f7ac0000 R14: ffff8883f7ac0d90 R15: ffff8883f844d000
<4>[    3.324908] FS:  00007ffa4a839680(0000) GS:ffff888410000000(0000) knlGS:0000000000000000
<4>[    3.324917] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[    3.324923] CR2: 0000000000000000 CR3: 0000000401aa4002 CR4: 00000000001606f0
<4>[    3.324930] Call Trace:
<4>[    3.324980]  ? gen6_read32+0x272/0x300 [i915]
<4>[    3.325044]  intel_ddi_get_config+0x238/0x610 [i915]
<4>[    3.325108]  hsw_crt_get_config+0x12/0x40 [i915]
<4>[    3.325173]  intel_modeset_setup_hw_state+0x3b3/0x1660 [i915]
<4>[    3.325182]  ? ww_mutex_lock+0x39/0x70
<4>[    3.325190]  ? drm_modeset_lock+0xad/0x120
<4>[    3.325254]  intel_modeset_init+0x582/0x1c50 [i915]

Fixes: 419190429c ("drm/i915/hdmi: use struct drm_device based logging")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Wambui Karuga <wambui.karugax@gmail.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200326082838.16357-1-chris@chris-wilson.co.uk
2020-03-26 11:22:06 +00:00
..
display drm/i915/display: Remove useless but deadly local 2020-03-26 11:22:06 +00:00
gem drm/i915: Drop final few uses of drm_i915_private.engine 2020-03-26 10:50:17 +00:00
gt drm/i915: Drop final few uses of drm_i915_private.engine 2020-03-26 10:50:17 +00:00
gvt drm/i915: Move GGTT fence registers under gt/ 2020-03-16 20:28:26 +00:00
selftests drm/i915: Drop final few uses of drm_i915_private.engine 2020-03-26 10:50:17 +00:00
.gitignore
i915_active_types.h
i915_active.c drm/i915/gt: Delay release of engine-pm after last retirement 2020-03-23 12:51:19 +00:00
i915_active.h drm/i915: Extend i915_request_await_active to use all timelines 2020-03-11 10:54:59 +00:00
i915_buddy.c drm/i915/buddy: avoid double list_add 2020-03-06 14:33:08 +00:00
i915_buddy.h
i915_cmd_parser.c drm/i915/cmd_parser: conversion to struct drm_device logging macros. 2020-02-04 11:29:40 +02:00
i915_debugfs_params.c
i915_debugfs_params.h
i915_debugfs.c drm/i915: Remove debugfs i915_drpc_info and i915_forcewake_domains 2020-03-11 09:47:12 +00:00
i915_debugfs.h drm/i915: split out display debugfs to a separate file 2020-02-14 13:26:51 +02:00
i915_drv.c drm/i915/gt: Pull restoration of GGTT fences underneath the GT 2020-03-16 20:28:28 +00:00
i915_drv.h drm/i915: Drop final few uses of drm_i915_private.engine 2020-03-26 10:50:17 +00:00
i915_fixed.h
i915_gem_evict.c drm/i915: Drop inspection of execbuf flags during evict 2020-03-03 21:52:51 +00:00
i915_gem_gtt.c drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_gem_gtt.h
i915_gem.c drm/i915/gt: Pull restoration of GGTT fences underneath the GT 2020-03-16 20:28:28 +00:00
i915_gem.h
i915_getparam.c
i915_globals.c
i915_globals.h
i915_gpu_error.c drm/i915: Update drm/i915 bug filing URL 2020-02-17 11:16:05 +02:00
i915_gpu_error.h drm/i915: Track hw reported context runtime 2020-02-16 15:16:22 +00:00
i915_ioc32.c drm/i915: add i915_ioc32.h for compat 2020-03-02 13:32:37 +02:00
i915_ioc32.h drm/i915: add i915_ioc32.h for compat 2020-03-02 13:32:37 +02:00
i915_irq.c drm/i915: Drop final few uses of drm_i915_private.engine 2020-03-26 10:50:17 +00:00
i915_irq.h
i915_memcpy.c
i915_memcpy.h
i915_mm.c
i915_params.c
i915_params.h drm/i915: Mark i915.reset as unsigned 2020-02-05 18:51:52 +00:00
i915_pci.c drm/i915/tgl: Remove require_force_probe protection 2020-03-13 14:26:09 -07:00
i915_perf_types.h drm/i915/perf: introduce global sseu pinning 2020-03-17 15:27:55 +02:00
i915_perf.c drm/i915/perf: Invalidate OA TLB on when closing perf stream 2020-03-18 00:30:52 +02:00
i915_perf.h
i915_pmu.c drm/i915/pmu: Avoid using globals for PMU events 2020-02-21 17:31:15 +00:00
i915_pmu.h drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_priolist_types.h
i915_pvinfo.h
i915_query.c
i915_query.h
i915_reg.h drm/i915/color: Extract icl_read_luts() 2020-03-18 14:38:35 +02:00
i915_request.c drm/i915: Rely on direct submission to the queue 2020-03-23 11:51:39 +00:00
i915_request.h drm/i915: Defer semaphore priority bumping to a workqueue 2020-03-10 23:12:38 +00:00
i915_scatterlist.c
i915_scatterlist.h
i915_scheduler_types.h
i915_scheduler.c drm/i915: Tweak scheduler's kick_submission() 2020-03-10 23:12:38 +00:00
i915_scheduler.h
i915_selftest.h
i915_suspend.c drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_suspend.h
i915_sw_fence_work.c drm/i915: Immediately execute the fenced work 2020-03-25 13:05:04 +00:00
i915_sw_fence_work.h drm/i915: Immediately execute the fenced work 2020-03-25 13:05:04 +00:00
i915_sw_fence.c drm/i915: Prefer '%ps' for printing function symbol names 2020-03-19 16:18:14 +00:00
i915_sw_fence.h drm/i915/gem: Don't leak non-persistent requests on changing engines 2020-02-11 21:58:39 +00:00
i915_switcheroo.c
i915_switcheroo.h
i915_syncmap.c
i915_syncmap.h
i915_sysfs.c drm/i915/gt: Expose engine properties via sysfs 2020-02-28 22:03:19 +00:00
i915_sysfs.h
i915_trace_points.c
i915_trace.h
i915_user_extensions.c
i915_user_extensions.h
i915_utils.c drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED panel 2020-03-03 20:34:32 -05:00
i915_utils.h drm/i915/gt: Mark up racy check of last list element 2020-03-09 18:23:59 +00:00
i915_vgpu.c drm/i915/vgpu: improve vgpu abstractions 2020-03-03 17:46:54 +02:00
i915_vgpu.h drm/i915/vgpu: improve vgpu abstractions 2020-03-03 17:46:54 +02:00
i915_vma_types.h drm/i915/gem: Extract transient execbuf flags from i915_vma 2020-03-03 21:52:51 +00:00
i915_vma.c drm/i915: Immediately execute the fenced work 2020-03-25 13:05:04 +00:00
i915_vma.h drm/i915/gt: Allocate i915_fence_reg array 2020-03-16 20:28:29 +00:00
intel_device_info.c drm/i915: Enable non-contiguous pipe fusing 2020-03-18 16:13:28 +05:30
intel_device_info.h drm/i915: Read rawclk_freq earlier 2020-02-19 14:09:18 +00:00
intel_dram.c drm/i915/dram: hide the dram structs better 2020-03-02 13:32:27 +02:00
intel_dram.h drm/i915: split out intel_dram.[ch] from i915_drv.c 2020-02-27 09:16:01 +02:00
intel_gvt.c drm/i915/gvt: make intel_gvt_active internal to intel_gvt 2020-03-03 17:47:03 +02:00
intel_gvt.h
intel_memory_region.c
intel_memory_region.h
intel_pch.c
intel_pch.h
intel_pm.c drm/i915: Implement display w/a 1140 for glk/cnl 2020-03-05 15:53:33 +02:00
intel_pm.h drm/i915: Manipulate DBuf slices properly 2020-02-05 19:19:23 +02:00
intel_region_lmem.c
intel_region_lmem.h
intel_runtime_pm.c
intel_runtime_pm.h
intel_sideband.c
intel_sideband.h
intel_uncore.c drm/i915/selftests: Measure the energy consumed while in RC6 2020-03-25 11:33:05 +00:00
intel_uncore.h drm/i915/selftests: Measure the energy consumed while in RC6 2020-03-25 11:33:05 +00:00
intel_wakeref.c drm/i915: Extend intel_wakeref to support delayed puts 2020-03-23 12:51:05 +00:00
intel_wakeref.h drm/i915: Extend intel_wakeref to support delayed puts 2020-03-23 12:51:05 +00:00
intel_wopcm.c drm/i915/wopcm: convert to drm device based logging 2020-03-25 19:47:41 +02:00
intel_wopcm.h
Kconfig drm/i915: Update drm/i915 bug filing URL 2020-02-17 11:16:05 +02:00
Kconfig.debug
Kconfig.profile drm/i915/gen12: Disable preemption timeout 2020-03-12 13:46:01 +00:00
Kconfig.unstable
Makefile drm/i915/perf: remove generated code 2020-03-17 15:27:50 +02:00
vlv_suspend.c drm/i915: switch vlv_suspend to use intel uncore register accessors 2020-02-17 11:29:51 +02:00
vlv_suspend.h drm/i915: split out vlv/chv specific suspend/resume code 2020-02-17 11:29:35 +02:00