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

From: Naresh Kamboju
Date: Mon Jul 06 2020 - 06:55:01 EST

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