forked from Minki/linux
8fa4338acc
This prevents a deadlock that somehow results from the suspend() -> forbid() -> resume() callchain. [ 125.266960] [drm] Initialized nouveau 1.3.1 20120801 for 0000:02:00.0 on minor 1 [ 370.120872] INFO: task kworker/4:1:77 blocked for more than 120 seconds. [ 370.120920] Tainted: G O 4.12.0-rc3 #20 [ 370.120947] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 370.120982] kworker/4:1 D13808 77 2 0x00000000 [ 370.120998] Workqueue: pm pm_runtime_work [ 370.121004] Call Trace: [ 370.121018] __schedule+0x2bf/0xb40 [ 370.121025] ? mark_held_locks+0x5f/0x90 [ 370.121038] schedule+0x3d/0x90 [ 370.121044] rpm_resume+0x107/0x870 [ 370.121052] ? finish_wait+0x90/0x90 [ 370.121065] ? pci_pm_runtime_resume+0xa0/0xa0 [ 370.121070] pm_runtime_forbid+0x4c/0x60 [ 370.121129] nouveau_pmops_runtime_suspend+0xaf/0xc0 [nouveau] [ 370.121139] pci_pm_runtime_suspend+0x5f/0x170 [ 370.121147] ? pci_pm_runtime_resume+0xa0/0xa0 [ 370.121152] __rpm_callback+0xb9/0x1e0 [ 370.121159] ? pci_pm_runtime_resume+0xa0/0xa0 [ 370.121166] rpm_callback+0x24/0x80 [ 370.121171] ? pci_pm_runtime_resume+0xa0/0xa0 [ 370.121176] rpm_suspend+0x138/0x6e0 [ 370.121192] pm_runtime_work+0x7b/0xc0 [ 370.121199] process_one_work+0x253/0x6a0 [ 370.121216] worker_thread+0x4d/0x3b0 [ 370.121229] kthread+0x133/0x150 [ 370.121234] ? process_one_work+0x6a0/0x6a0 [ 370.121238] ? kthread_create_on_node+0x70/0x70 [ 370.121246] ret_from_fork+0x2a/0x40 [ 370.121283] Showing all locks held in the system: [ 370.121291] 2 locks held by kworker/4:1/77: [ 370.121298] #0: ("pm"){.+.+.+}, at: [<ffffffffac0d3530>] process_one_work+0x1d0/0x6a0 [ 370.121315] #1: ((&dev->power.work)){+.+.+.}, at: [<ffffffffac0d3530>] process_one_work+0x1d0/0x6a0 [ 370.121330] 1 lock held by khungtaskd/81: [ 370.121333] #0: (tasklist_lock){.+.+..}, at: [<ffffffffac10fc8d>] debug_show_all_locks+0x3d/0x1a0 [ 370.121355] 1 lock held by dmesg/1639: [ 370.121358] #0: (&user->lock){+.+.+.}, at: [<ffffffffac124b6d>] devkmsg_read+0x4d/0x360 [ 370.121377] ============================================= Signed-off-by: Ben Skeggs <bskeggs@redhat.com> |
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|---|---|---|
| .. | ||
| dispnv04 | ||
| include | ||
| nvif | ||
| nvkm | ||
| Kbuild | ||
| Kconfig | ||
| nouveau_abi16.c | ||
| nouveau_abi16.h | ||
| nouveau_acpi.c | ||
| nouveau_acpi.h | ||
| nouveau_backlight.c | ||
| nouveau_bios.c | ||
| nouveau_bios.h | ||
| nouveau_bo.c | ||
| nouveau_bo.h | ||
| nouveau_chan.c | ||
| nouveau_chan.h | ||
| nouveau_connector.c | ||
| nouveau_connector.h | ||
| nouveau_crtc.h | ||
| nouveau_debugfs.c | ||
| nouveau_debugfs.h | ||
| nouveau_display.c | ||
| nouveau_display.h | ||
| nouveau_dma.c | ||
| nouveau_dma.h | ||
| nouveau_dp.c | ||
| nouveau_drm.c | ||
| nouveau_drv.h | ||
| nouveau_encoder.h | ||
| nouveau_fbcon.c | ||
| nouveau_fbcon.h | ||
| nouveau_fence.c | ||
| nouveau_fence.h | ||
| nouveau_gem.c | ||
| nouveau_gem.h | ||
| nouveau_hwmon.c | ||
| nouveau_hwmon.h | ||
| nouveau_ioc32.c | ||
| nouveau_ioctl.h | ||
| nouveau_led.c | ||
| nouveau_led.h | ||
| nouveau_nvif.c | ||
| nouveau_platform.c | ||
| nouveau_platform.h | ||
| nouveau_prime.c | ||
| nouveau_reg.h | ||
| nouveau_sgdma.c | ||
| nouveau_ttm.c | ||
| nouveau_ttm.h | ||
| nouveau_usif.c | ||
| nouveau_usif.h | ||
| nouveau_vga.c | ||
| nouveau_vga.h | ||
| nv04_fbcon.c | ||
| nv04_fence.c | ||
| nv10_fence.c | ||
| nv10_fence.h | ||
| nv17_fence.c | ||
| nv50_display.c | ||
| nv50_display.h | ||
| nv50_fbcon.c | ||
| nv50_fence.c | ||
| nv84_fence.c | ||
| nvc0_fbcon.c | ||
| nvc0_fence.c | ||