https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5288/fi-kbl-7560u/igt@i915_module_load@reload-with-fault-injection.html [470.396983] DEBUG_LOCKS_WARN_ON(mutex_is_locked(lock)) <4> [470.396989] WARNING: CPU: 1 PID: 3246 at kernel/locking/mutex-debug.c:103 mutex_destroy+0x47/0x50 <4> [470.397000] Modules linked in: i915(-) vgem cdc_ether usbnet r8152 mii snd_hda_codec_hdmi thunderbolt snd_hda_codec_realtek snd_hda_codec_generic mei_hdcp x86_pkg_temp_thermal coretemp crct10dif_pclmul crc32_pclmul btusb btrtl ghash_clmulni_intel snd_intel_dspcfg btbcm snd_hda_codec btintel snd_hwdep snd_hda_core bluetooth snd_pcm ecdh_generic mei_me ecc mei prime_numbers i2c_hid pinctrl_sunrisepoint pinctrl_intel [last unloaded: i915] <4> [470.397041] CPU: 1 PID: 3246 Comm: i915_module_loa Tainted: G U 5.4.0-rc7-CI-CI_DRM_7350+ #1 <4> [470.397049] Hardware name: Dell Inc. XPS 13 9360/0823VW, BIOS 2.9.0 07/09/2018 <4> [470.397056] RIP: 0010:mutex_destroy+0x47/0x50 <4> [470.397060] Code: 84 c0 74 ed e8 da 65 3d 00 85 c0 74 e4 8b 05 e0 28 23 01 85 c0 75 da 48 c7 c6 c5 ae 09 82 48 c7 c7 a8 83 08 82 e8 b9 e6 f9 ff <0f> 0b eb c3 0f 1f 44 00 00 48 b8 11 11 11 11 11 11 11 11 48 89 76 <4> [470.397074] RSP: 0018:ffffc900005e3db0 EFLAGS: 00010286 <4> [470.397079] RAX: 0000000000000000 RBX: ffff88825b9141e8 RCX: 0000000000000001 <4> [470.397085] RDX: 0000000080000001 RSI: 0000000000000000 RDI: ffffffff8112ad6c <4> [470.397091] RBP: ffff888260c66800 R08: 0000000000000000 R09: 0000000000038840 <4> [470.397097] R10: 0000000000000000 R11: 0000000000000cae R12: ffffffffa050a1e0 <4> [470.397103] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffa050a2d8 <4> [470.397110] FS: 00007f5742825e40(0000) GS:ffff888276280000(0000) knlGS:0000000000000000 <4> [470.397117] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 <4> [470.397122] CR2: 00005574ac3a7048 CR3: 0000000256338004 CR4: 00000000003606e0 <4> [470.397128] Call Trace: <4> [470.397133] drm_fb_helper_fini.part.8+0xb7/0x110 <4> [470.397181] intel_fbdev_fini+0x20/0x60 [i915] <4> [470.397226] intel_modeset_driver_remove+0xa6/0x160 [i915] <4> [470.397256] i915_driver_remove+0xad/0x110 [i915] <4> [470.397285] i915_pci_remove+0x19/0x40 [i915] <4> [470.397292] pci_device_remove+0x36/0xb0 <4> [470.397297] device_release_driver_internal+0xe0/0x1c0 <4> [470.397302] driver_detach+0x42/0x80 <4> [470.397308] bus_remove_driver+0x56/0xd0 <4> [470.397312] pci_unregister_driver+0x25/0xa0 <4> [470.397352] i915_exit+0x16/0x1c [i915] <4> [470.397358] __x64_sys_delete_module+0x115/0x1d0 <4> [470.397364] ? trace_hardirqs_off_thunk+0x1a/0x20 <4> [470.397369] ? do_syscall_64+0xd/0x210 <4> [470.397374] do_syscall_64+0x4f/0x210 <4> [470.397379] entry_SYSCALL_64_after_hwframe+0x49/0xbe <4> [470.397385] RIP: 0033:0x7f5741cbf1b7 <4> [470.397389] Code: 73 01 c3 48 8b 0d d1 8c 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 8c 2c 00 f7 d8 64 89 01 48 <4> [470.397403] RSP: 002b:00007ffd8b276308 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0 <4> [470.397410] RAX: ffffffffffffffda RBX: 00007ffd8b276480 RCX: 00007f5741cbf1b7 <4> [470.397416] RDX: 0000000000000001 RSI: 0000000000000800 RDI: 0000560b650e5be8 <4> [470.397422] RBP: 0000560b650e5b80 R08: 0000560b650e5bec R09: 00007ffd8b276330 <4> [470.397428] R10: 00007ffd8b275304 R11: 0000000000000206 R12: 0000000000000000 <4> [470.397434] R13: 00007ffd8b2769f0 R14: 0000000000000000 R15: 0000000000000000 <4> [470.397442] irq event stamp: 4133425 <4> [470.397447] hardirqs last enabled at (4133425): [<ffffffff814fe717>] __free_object+0x257/0x310 <4> [470.397455] hardirqs last disabled at (4133424): [<ffffffff814fe4e9>] __free_object+0x29/0x310 <4> [470.397463] softirqs last enabled at (4133112): [<ffffffff81c00385>] __do_softirq+0x385/0x47f <4> [470.397471] softirqs last disabled at (4133105): [<ffffffff810b803a>] irq_exit+0xba/0xc0 <4> [470.397478] ---[ end trace 20b169f5effbd576 ]---
The CI Bug Log issue associated to this bug has been updated. ### New filters associated * KBL: igt@i915_module_load@reload-with-fault-injection - incomplete - DEBUG_LOCKS_WARN_ON(mutex_is_locked(lock)) (No new failures associated)
So the drm_poll_helper_fini() is a little too early. commit 448aa9117cfa6591c4e18cb32a0329a66b9cd3b7 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Tue Nov 28 11:01:47 2017 +0000 drm/i915: Enable hotplug polling after registering the outputs I'd like to split drm_kms_helper_probe_enable/disable so that we can use it in register/unregister and so move the init/fini back to their original locations.
Chris, are you saying this already fixed?
(In reply to Jani Saarinen from comment #3) > Chris, are you saying this already fixed? Just reminding myself of the conversation with Daniel about the likely cause here. No, it's not yet fixed.
OK, this is only DP_MST setup in CI. Setup is Dell XPS (KBL) and TB16 dock connected to port and from dock mini-DP to DP-MST (4K) Dell monitor (DP In) and from that DP out to normal Dell Monitor
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