From: Andre Renaud <arenaud@designa-electronics.com>
To: linux-arm-kernel@lists.infradead.org
Subject: iMX6/UART imprecise external abort
Date: Tue, 3 Dec 2019 09:40:28 +1300 [thread overview]
Message-ID: <CAEj2-1PyhkhEJ1+uRWio4vYxGuFOuR9mpZOdxmDDjGt_Az+3uA@mail.gmail.com> (raw)
Hello,
I am working with an iMX6Q system that is exhibiting a crash when
using the serial ports.
We have /dev/ttymxc2 configured as an RS485 UART, and are seeing an
'imprecise external abort' after some time of use (panic listed
below).
We are able to replicate this both on the custom kernel we're using,
as well as on the 5.3.x+fslc image from
https://github.com/Freescale/linux-fslc
To replicate it we have the mx6 hooked up to a PC, with each end
sending short 3-4 character messages every second. The fault kicks in
after about 15-30 minutes. This seems similar to the fault described
here: https://lkml.org/lkml/2019/11/11/588. We have tried shutting
down DMA and various performance/cpuidle systems, but that doesn't
seem to have any impact.
Does anyone have any thoughts on how to solve this?
Regards,
Andre
[ 5047.074427] Unhandled fault: imprecise external abort (0x1406) at 0xb6e00f78
[ 5047.081498] pgd = c0004000
[ 5047.084213] [b6e00f78] *pgd=00000000
[ 5047.087813] Internal error: : 1406 [#1] SMP ARM
[ 5047.092348] Modules linked in:
[ 5047.095429] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.8.0+ #19
[ 5047.101440] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 5047.107974] task: ef0ecd00 task.stack: ef158000
[ 5047.112521] PC is at arch_cpu_idle+0x48/0x4c
[ 5047.116799] LR is at arch_cpu_idle+0x44/0x4c
[ 5047.121077] pc : [<c0108c70>] lr : [<c0108c6c>] psr: 60070013
[ 5047.121077] sp : ef159f98 ip : ef159fa8 fp : ef159fa4
[ 5047.132560] r10: 00000000 r9 : 00000002 r8 : c0d025dc
[ 5047.137791] r7 : c0d95448 r6 : ef158000 r5 : c0d02648 r4 : ef158000
[ 5047.144324] r3 : c011a140 r2 : 005bc18a r1 : ef7ae3c0 r0 : 00000000
[ 5047.150858] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 5047.157998] Control: 10c5387d Table: 3dd9804a DAC: 00000051
[ 5047.163748] Process swapper/1 (pid: 0, stack limit = 0xef158210)
[ 5047.169759] Stack: (0xef159f98 to 0xef15a000)
[ 5047.174124] 9f80:
ef159fb4 ef159fa8
[ 5047.182310] 9fa0: c0170b54 c0108c34 ef159fdc ef159fb8 c0170da4
c0170b30 c0a8fb48 c0d8b845
[ 5047.190496] 9fc0: c0d8c48c c0d025dc 10c0387d c0d95448 ef159ff4
ef159fe0 c010e6cc c0170b6c
[ 5047.198682] 9fe0: 3f0fc06a 00000051 00000000 ef159ff8 101018cc
c010e580 edddf4eb ffeebffd
[ 5047.206887] [<c0108c70>] (arch_cpu_idle) from [<c0170b54>]
(default_idle_call+0x30/0x3c)
[ 5047.214993] [<c0170b54>] (default_idle_call) from [<c0170da4>]
(cpu_startup_entry+0x244/0x298)
[ 5047.223619] [<c0170da4>] (cpu_startup_entry) from [<c010e6cc>]
(secondary_start_kernel+0x158/0x164)
[ 5047.232677] [<c010e6cc>] (secondary_start_kernel) from [<101018cc>]
(0x101018cc)
[ 5047.240083] Code: e34c30d0 e5933014 e12fff33 f1080080 (e89da800)
[ 5047.246190] ---[ end trace 853e028df8c9b7cd ]---
[ 5047.250814] Kernel panic - not syncing: Attempted to kill the idle task!
[ 5047.257528] CPU2: stopping
[ 5047.260250] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G D
4.8.0+ #19
[ 5047.267476] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 5047.274022] [<c0110cc4>] (unwind_backtrace) from [<c010c9d0>]
(show_stack+0x20/0x24)
[ 5047.281783] [<c010c9d0>] (show_stack) from [<c04939c8>]
(dump_stack+0x90/0xa4)
[ 5047.289019] [<c04939c8>] (dump_stack) from [<c010ebe8>]
(handle_IPI+0x2a4/0x2c4)
[ 5047.296426] [<c010ebe8>] (handle_IPI) from [<c01014dc>]
(gic_handle_irq+0x80/0x84)
[ 5047.304013] [<c01014dc>] (gic_handle_irq) from [<c080c8cc>]
(__irq_svc+0x6c/0x90)
[ 5047.311500] Exception stack(0xef15bf48 to 0xef15bf90)
[ 5047.316561] bf40: 00000000 ef7bd3c0 00729232
c011a140 ef15a000 c0d02648
[ 5047.324747] bf60: ef15a000 c0d95448 c0d025dc 00000004 00000000
ef15bfa4 ef15bfa8 ef15bf98
[ 5047.332930] bf80: c0108c6c c0108c70 60000013 ffffffff
[ 5047.337999] [<c080c8cc>] (__irq_svc) from [<c0108c70>]
(arch_cpu_idle+0x48/0x4c)
[ 5047.345410] [<c0108c70>] (arch_cpu_idle) from [<c0170b54>]
(default_idle_call+0x30/0x3c)
[ 5047.353514] [<c0170b54>] (default_idle_call) from [<c0170da4>]
(cpu_startup_entry+0x244/0x298)
[ 5047.362137] [<c0170da4>] (cpu_startup_entry) from [<c010e6cc>]
(secondary_start_kernel+0x158/0x164)
[ 5047.371191] [<c010e6cc>] (secondary_start_kernel) from [<101018cc>]
(0x101018cc)
[ 5047.378593] CPU3: stopping
[ 5047.381314] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G D
4.8.0+ #19
[ 5047.388540] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 5047.395085] [<c0110cc4>] (unwind_backtrace) from [<c010c9d0>]
(show_stack+0x20/0x24)
[ 5047.402841] [<c010c9d0>] (show_stack) from [<c04939c8>]
(dump_stack+0x90/0xa4)
[ 5047.410073] [<c04939c8>] (dump_stack) from [<c010ebe8>]
(handle_IPI+0x2a4/0x2c4)
[ 5047.417479] [<c010ebe8>] (handle_IPI) from [<c01014dc>]
(gic_handle_irq+0x80/0x84)
[ 5047.425060] [<c01014dc>] (gic_handle_irq) from [<c080c8cc>]
(__irq_svc+0x6c/0x90)
[ 5047.432546] Exception stack(0xef15df48 to 0xef15df90)
[ 5047.437606] df40: 00000000 ef7cc3c0 00512f92
c011a140 ef15c000 c0d02648
[ 5047.445792] df60: ef15c000 c0d95448 c0d025dc 00000008 00000000
ef15dfa4 ef15dfa8 ef15df98
[ 5047.453974] df80: c0108c6c c0108c70 600d0013 ffffffff
[ 5047.459041] [<c080c8cc>] (__irq_svc) from [<c0108c70>]
(arch_cpu_idle+0x48/0x4c)
[ 5047.466452] [<c0108c70>] (arch_cpu_idle) from [<c0170b54>]
(default_idle_call+0x30/0x3c)
[ 5047.474555] [<c0170b54>] (default_idle_call) from [<c0170da4>]
(cpu_startup_entry+0x244/0x298)
[ 5047.483179] [<c0170da4>] (cpu_startup_entry) from [<c010e6cc>]
(secondary_start_kernel+0x158/0x164)
[ 5047.492234] [<c010e6cc>] (secondary_start_kernel) from [<101018cc>]
(0x101018cc)
[ 5047.499635] CPU0: stopping
[ 5047.502356] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D
4.8.0+ #19
[ 5047.509582] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[ 5047.516126] [<c0110cc4>] (unwind_backtrace) from [<c010c9d0>]
(show_stack+0x20/0x24)
[ 5047.523883] [<c010c9d0>] (show_stack) from [<c04939c8>]
(dump_stack+0x90/0xa4)
[ 5047.531116] [<c04939c8>] (dump_stack) from [<c010ebe8>]
(handle_IPI+0x2a4/0x2c4)
[ 5047.538521] [<c010ebe8>] (handle_IPI) from [<c01014dc>]
(gic_handle_irq+0x80/0x84)
[ 5047.546102] [<c01014dc>] (gic_handle_irq) from [<c080c8cc>]
(__irq_svc+0x6c/0x90)
[ 5047.553588] Exception stack(0xc0d01d78 to 0xc0d01dc0)
[ 5047.558645] 1d60:
ee4dfae8 20070113
[ 5047.566831] 1d80: 00000730 000049db ee4dfa80 ef3d9de0 ee4dfae8
20070113 00000020 00000000
[ 5047.575016] 1da0: c0d0799c c0d01dd4 c0d01dd8 c0d01dc8 c05fdd00
c080c26c 60070113 ffffffff
[ 5047.583205] [<c080c8cc>] (__irq_svc) from [<c080c26c>]
(_raw_spin_unlock_irqrestore+0x30/0x34)
[ 5047.591839] [<c080c26c>] (_raw_spin_unlock_irqrestore) from
[<c05fdd00>] (sdhci_tasklet_finish+0xfc/0x234)
[ 5047.601507] [<c05fdd00>] (sdhci_tasklet_finish) from [<c012dfe8>]
(tasklet_action+0x68/0xf8)
[ 5047.609955] [<c012dfe8>] (tasklet_action) from [<c0101630>]
(__do_softirq+0x150/0x34c)
[ 5047.617892] [<c0101630>] (__do_softirq) from [<c012d9e0>]
(irq_exit+0xc8/0x128)
[ 5047.625218] [<c012d9e0>] (irq_exit) from [<c0181338>]
(__handle_domain_irq+0x70/0xc4)
[ 5047.633060] [<c0181338>] (__handle_domain_irq) from [<c01014a4>]
(gic_handle_irq+0x48/0x84)
[ 5047.641421] [<c01014a4>] (gic_handle_irq) from [<c080c8cc>]
(__irq_svc+0x6c/0x90)
[ 5047.648907] Exception stack(0xc0d01f08 to 0xc0d01f50)
[ 5047.653965] 1f00: 00000000 ef79f3c0 00449df4
c011a140 c0d00000 c0d02648
[ 5047.662151] 1f20: c0d00000 c0d02540 c0d025dc 00000001 ef7db300
c0d01f64 c0d01f68 c0d01f58
[ 5047.670333] 1f40: c0108c6c c0108c70 60070013 ffffffff
[ 5047.675399] [<c080c8cc>] (__irq_svc) from [<c0108c70>]
(arch_cpu_idle+0x48/0x4c)
[ 5047.682809] [<c0108c70>] (arch_cpu_idle) from [<c0170b54>]
(default_idle_call+0x30/0x3c)
[ 5047.690911] [<c0170b54>] (default_idle_call) from [<c0170da4>]
(cpu_startup_entry+0x244/0x298)
[ 5047.699533] [<c0170da4>] (cpu_startup_entry) from [<c0806eb8>]
(rest_init+0x84/0x88)
[ 5047.707292] [<c0806eb8>] (rest_init) from [<c0c00d34>]
(start_kernel+0x390/0x39c)
[ 5047.714786] ---[ end Kernel panic - not syncing: Attempted to kill
the idle task!
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next reply other threads:[~2019-12-02 20:40 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-02 20:40 Andre Renaud [this message]
2019-12-02 20:56 ` iMX6/UART imprecise external abort Fabio Estevam
2019-12-03 1:53 ` [EXT] " Andy Duan
2019-12-03 2:01 ` Andre Renaud
2019-12-03 2:06 ` Andy Duan
2019-12-03 2:28 ` Fabio Estevam
2019-12-03 6:24 ` Andre Renaud
2019-12-10 4:03 ` Andre Renaud
2019-12-10 5:46 ` [EXT] " Andy Duan
2019-12-10 22:07 ` Andre Renaud
2019-12-11 0:27 ` Fabio Estevam
2019-12-11 1:35 ` [EXT] " Andre Renaud
2019-12-11 1:59 ` Andre Renaud
2019-12-12 1:35 ` Fabio Estevam
2019-12-15 23:41 ` Andre Renaud
2019-12-02 21:29 ` Uwe Kleine-König
2019-12-05 19:29 ` Andre Renaud
2019-12-21 3:33 ` Andre Renaud
2019-12-21 7:31 ` [EXT] " Andy Duan
2019-12-21 12:03 ` Fabio Estevam
2019-12-23 1:53 ` Andy Duan
2019-12-23 10:16 ` Uwe Kleine-König
2020-01-07 22:24 ` Uwe Kleine-König
2020-01-08 1:43 ` Andy Duan
2020-01-08 4:03 ` Andre Renaud
2020-01-08 5:11 ` Andy Duan
2020-01-08 6:43 ` Uwe Kleine-König
2020-01-08 6:40 ` Uwe Kleine-König
2020-01-08 11:23 ` Uwe Kleine-König
2020-01-09 1:33 ` Andy Duan
2020-01-19 23:29 ` Andre Renaud
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