linux-kernel - WARNING: kernel/irq/chip.c:242 __irq

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Date:   Tue, 13 Oct 2020 11:09:47 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     open list <linux-kernel@...r.kernel.org>,
        linux- stable <stable@...r.kernel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, Marc Zyngier <maz@...nel.org>
Subject: WARNING: kernel/irq/chip.c:242 __irq_startup+0xa8/0xb0

On stable rc  5.8.15 the following kernel warning was noticed once
while boot and this is hard to reproduce.

metadata:
  git branch: linux-5.8.y
  git repo: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
  git commit: f4ed6fb8f1680de812daf362f28342e6bf19fdcc
  git describe: v5.8.14-125-gf4ed6fb8f168
  make_kernelversion: 5.8.15-rc1
  kernel-config:
https://builds.tuxbuild.com/5nFtomB9FDlQVjafKdyR9A/kernel.config

warning log:
----------------
[   43.512935] ------------[ cut here ]------------
[   43.517563] WARNING: CPU: 0 PID: 424 at kernel/irq/chip.c:242
__irq_startup+0xa8/0xb0
[   43.517564] Modules linked in: caam error crct10dif_ce ina2xx lm90
qoriq_thermal fuse
[   43.533218] CPU: 0 PID: 424 Comm: (agetty) Not tainted 5.8.15-rc1 #1
[   43.533219] Hardware name: Freescale Layerscape 2088A RDB Board (DT)
[   43.533223] pstate: 60000085 (nZCv daIf -PAN -UAO BTYPE=--)
[   43.533225] pc : __irq_startup+0xa8/0xb0
[   43.533229] lr : irq_startup+0x64/0x140
[   43.559218] sp : ffff800010b838c0
[   43.559219] x29: ffff800010b838c0 x28: ffff0082cd3bab00
[   43.559222] x27: ffffb8c772ed8ec0 x26: 0000000000020902
[   43.573133] x25: ffffb8c771d39e68 x24: ffffb8c771d39b08
[   43.573135] x23: 0000000000000000 x22: 0000000000000001
[   43.573138] x21: 0000000000000001 x20: ffff0082edf42c40
[   43.573140] x19: ffff0082ede29200 x18: 0000000000000001
[   43.573142] x17: 0000000000000000 x16: 0000000000000000
[   43.573145] x15: ffff0082edf430c0 x14: ffff800010bf5000
[   43.573147] x13: ffff800010bed000 x12: ffff800010be9000
[   43.573149] x11: 0000000000000040 x10: ffffb8c772cdb940
[   43.573153] x9 : ffffb8c770b7fe0c x8 : ffff0082ee000270
[   43.620866] x7 : 0000000000000000 x6 : ffffb8c772cbaa08
[   43.620869] x5 : ffffb8c772cba000 x4 : 0000000000000504
[   43.620871] x3 : ffff0082ede29200 x2 : 0000000003032004
[   43.636780] x1 : 0000000003032004 x0 : ffff0082ede29258
[   43.636783] Call trace:
[   43.636786]  __irq_startup+0xa8/0xb0
[   43.636789]  irq_startup+0x64/0x140
[   43.651569]  __enable_irq+0x78/0x88
[   43.651571]  enable_irq+0x54/0xa8
[   43.651577]  serial8250_do_startup+0x670/0x718
[   43.662791]  serial8250_startup+0x30/0x40
[   43.666793]  uart_startup.part.0+0x12c/0x2e0
[   43.671055]  uart_port_activate+0x68/0xa0
[   43.675058]  tty_port_open+0x98/0x250
[   43.678712]  uart_open+0x24/0x38
[   43.681932]  tty_open+0x100/0x480
[   43.685240]  chrdev_open+0xac/0x1a8
[   43.688721]  do_dentry_open+0x130/0x3d0
[   43.692548]  vfs_open+0x34/0x40
[   43.695681]  path_openat+0x888/0xde8
[   43.699247]  do_filp_open+0x80/0x108
[   43.702814]  do_sys_openat2+0x1ec/0x2a8
[   43.706642]  do_sys_open+0x60/0xa8
[   43.710035]  __arm64_sys_openat+0x2c/0x38
[   43.714037]  el0_svc_common.constprop.0+0x7c/0x198
[   43.718820]  do_el0_svc+0x2c/0x98
[   43.722128]  el0_sync_handler+0x9c/0x1b8
[   43.726041]  el0_sync+0x158/0x180
[   43.729347] ---[ end trace 434ed7c8787a1d1f ]---

full log,
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-5.8.y/build/v5.8.14-125-gf4ed6fb8f168/testrun/3297947/suite/linux-log-parser/test/check-kernel-warning-93863/log


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Linaro LKFT
https://lkft.linaro.org