WARNING: at kernel/kthread.c:819 kthread_queue_work - spi_start_queue

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While booting arm64 device dragonboard 410c the following kernel
warning noticed on
Linux version 5.8.0-rc3-next-20200706.

metadata:
  git branch: master
  git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
  git commit: 5680d14d59bddc8bcbc5badf00dbbd4374858497
  git describe: next-20200706
  kernel-config:
https://builds.tuxbuild.com/Glr-Ql1wbp3qN3cnHogyNA/kernel.config

Crash log while booting,

[    1.203300] loop: module loaded
[    1.204599] megasas: 07.714.04.00-rc1
[    1.211124] spi_qup 78b7000.spi: IN:block:16, fifo:64, OUT:block:16, fifo:64
[    1.211509] ------------[ cut here ]------------
[    1.217238] WARNING: CPU: 0 PID: 1 at kernel/kthread.c:819
kthread_queue_work+0x90/0xa0
[    1.221832] Modules linked in:
[    1.229554] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
5.8.0-rc3-next-20200706 #1
[    1.232683] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
[    1.240237] pstate: 40000085 (nZcv daIf -PAN -UAO BTYPE=--)
[    1.246918] pc : kthread_queue_work+0x90/0xa0
[    1.252211] lr : kthread_queue_work+0x2c/0xa0
[    1.256722] sp : ffff80001002ba50
[    1.261061] x29: ffff80001002ba50 x28: ffff00003b868000
[    1.264363] x27: ffff00003fcf63c0 x26: ffff00003b868680
[    1.269744] x25: ffff00003b868400 x24: ffff00003d116810
[    1.275039] x23: ffff800012025304 x22: ffff00003b8683bc
[    1.280335] x21: 0000000000000000 x20: ffff00003b8683f8
[    1.285630] x19: ffff00003b8683b8 x18: 0000000000000000
[    1.290925] x17: 0000000000000000 x16: ffff800011167420
[    1.296220] x15: ffff00000eb90480 x14: 0000000000000267
[    1.301515] x13: 0000000000000004 x12: 0000000000000000
[    1.306810] x11: 0000000000000000 x10: 0000000000000003
[    1.312105] x9 : ffff00003fcbac10 x8 : ffff00003fcba240
[    1.317400] x7 : ffff00003bc3c800 x6 : 0000000000000003
[    1.322696] x5 : 0000000000000000 x4 : 0000000000000000
[    1.327991] x3 : ffff00003b8683bc x2 : 0000000000000001
[    1.333285] x1 : 0000000000000000 x0 : 0000000000000000
[    1.338583] Call trace:
[    1.343875]  kthread_queue_work+0x90/0xa0
[    1.346050]  spi_start_queue+0x50/0x78
[    1.350213]  spi_register_controller+0x458/0x820
[    1.353860]  devm_spi_register_controller+0x44/0xa0
[    1.358638]  spi_qup_probe+0x5d8/0x638
[    1.363235]  platform_drv_probe+0x54/0xa8
[    1.367053]  really_probe+0xd8/0x320
[    1.371133]  driver_probe_device+0x58/0xb8
[    1.374779]  device_driver_attach+0x74/0x80
[    1.378685]  __driver_attach+0x58/0xe0
[    1.382766]  bus_for_each_dev+0x70/0xc0
[    1.386583]  driver_attach+0x24/0x30
[    1.390317]  bus_add_driver+0x14c/0x1f0
[    1.394137]  driver_register+0x64/0x120
[    1.397696]  __platform_driver_register+0x48/0x58
[    1.401519]  spi_qup_driver_init+0x1c/0x28
[    1.406378]  do_one_initcall+0x54/0x1a0
[    1.410372]  kernel_init_freeable+0x1d4/0x254
[    1.414106]  kernel_init+0x14/0x110
[    1.418616]  ret_from_fork+0x10/0x34
[    1.421918] ---[ end trace 4b59f327623c9e10 ]---
[    1.426526] spi_qup 78b9000.spi: IN:block:16, fifo:64, OUT:block:16, fifo:64
[    1.430721] ------------[ cut here ]------------
[    1.437374] WARNING: CPU: 0 PID: 1 at kernel/kthread.c:819
kthread_queue_work+0x90/0xa0
[    1.441971] Modules linked in:
[    1.449694] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W
  5.8.0-rc3-next-20200706 #1
[    1.452823] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
[    1.461765] pstate: 40000085 (nZcv daIf -PAN -UAO BTYPE=--)
[    1.468444] pc : kthread_queue_work+0x90/0xa0
[    1.473738] lr : kthread_queue_work+0x2c/0xa0
[    1.478250] sp : ffff80001002ba50
[    1.482588] x29: ffff80001002ba50 x28: ffff00003b868800
[    1.485889] x27: ffff00003fcf7020 x26: ffff00003b868e80
[    1.491273] x25: ffff00003b868c00 x24: ffff00003d116c10
[    1.496566] x23: ffff80001202d304 x22: ffff00003b868bbc
[    1.501862] x21: 0000000000000000 x20: ffff00003b868bf8
[    1.507157] x19: ffff00003b868bb8 x18: 0000000000000000
[    1.512452] x17: 0000000000000000 x16: ffff800011167420
[    1.517748] x15: 00000000b123f581 x14: 0000000000000287
[    1.523043] x13: 0000000000000004 x12: 0000000000000000
[    1.528337] x11: 0000000000000000 x10: 0000000000000003
[    1.533634] x9 : ffff00003fcbac10 x8 : ffff00003fcba240
[    1.538928] x7 : ffff00003bc3d640 x6 : 0000000000000003
[    1.544223] x5 : 0000000000000000 x4 : 0000000000000000
[    1.549519] x3 : ffff00003b868bbc x2 : 0000000000000001
[    1.554813] x1 : 0000000000000000 x0 : 0000000000000000
[    1.560109] Call trace:
[    1.565403]  kthread_queue_work+0x90/0xa0
[    1.567577]  spi_start_queue+0x50/0x78
[    1.571742]  spi_register_controller+0x458/0x820
[    1.575387]  devm_spi_register_controller+0x44/0xa0
[    1.580165]  spi_qup_probe+0x5d8/0x638
[    1.584762]  platform_drv_probe+0x54/0xa8
[    1.588581]  really_probe+0xd8/0x320
[    1.592660]  driver_probe_device+0x58/0xb8
[    1.596306]  device_driver_attach+0x74/0x80
[    1.600212]  __driver_attach+0x58/0xe0
[    1.604294]  bus_for_each_dev+0x70/0xc0
[    1.608112]  driver_attach+0x24/0x30
[    1.611845]  bus_add_driver+0x14c/0x1f0
[    1.615665]  driver_register+0x64/0x120
[    1.619224]  __platform_driver_register+0x48/0x58
[    1.623046]  spi_qup_driver_init+0x1c/0x28
[    1.627905]  do_one_initcall+0x54/0x1a0
[    1.631899]  kernel_init_freeable+0x1d4/0x254
[    1.635632]  kernel_init+0x14/0x110
[    1.640144]  ret_from_fork+0x10/0x34
[    1.643442] ---[ end trace 4b59f327623c9e11 ]---

https://lkft.validation.linaro.org/scheduler/job/1542222#L3733

-- 
Linaro LKFT
https://lkft.linaro.org



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