Linux kernel crashes at spin_unlock_irq() when suspending the iMX serial port

[jeffreychang]

Question:

Linux kernel crashes at spin_unlock_irq() when the system tries to go into suspend mode. Any suggested solutions?

Environment:

• HW: iMX6 solo
• Linux kernel: 3.0.35-dirty (jffrychang@ubuntu) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #11 SMP PREEMPT Wed Apr 17 18:13:21 JST 2019
• Android: 4.4.2

Crash dump:

[16574.112726] Unhandled fault: imprecise external abort (0x1406) at 0x6cee4c78
[16574.119902] Internal error: : 1406 [#1] PREEMPT SMP
[16574.124846] Modules linked in: wl12xx_sdio fio_usb wl12xx mac80211 cfg80211 mipi_ov5645
[16574.133497] CPU: 0 Tainted: G W (3.0.35 #15)
[16574.138970] PC is at _raw_spin_unlock_irq+0x18/0x40
[16574.143976] LR is at uart_suspend_port+0x1c0/0x2a4
[16574.148834] pc : [<c06b91e0>] lr : [<c0341398>] psr: 60000013
[16574.148838] sp : d183dd98 ip : 00000000 fp : 00000f12
[16574.160506] r10: c097bda8 r9 : d449c848 r8 : c098e738
[16574.165849] r7 : c098e75c r6 : d449c850 r5 : d449c800 r4 : d4431c00
[16574.172441] r3 : 00000000 r2 : 00004025 r1 : a0000093 r0 : d4431c00
[16574.179089] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[16574.186462] Control: 10c53c7d Table: 1e37404a DAC: 00000015
[16574.192328]
[16574.192330] PC: 0xc06b9160:
[16574.196735] 9160 e1a0200d e3c23d7f e3c3303f e5932004 e2422001 e5832004 e5933000 e3130002
[16574.205705] 9180 012fff1e eafff88a f57ff05f e3a03000 e5803000 f57ff04f e320f004 e121f001
[16574.214675] 91a0 e1a0200d e3c23d7f e3c3303f e5932004 e2422001 e5832004 e5933000 e3130002
[16574.223645] 91c0 012fff1e eafff87a f57ff05f e3a03000 e5803000 f57ff04f e320f004 f1080080
[16574.232555] 91e0 e1a0200d e3c23d7f e3c3303f e5932004 e2422001 e5832004 e5933000 e3130002
[16574.241522] 9200 012fff1e eafff86a f57ff05f e1903f9f e2433001 e1802f93 e3320000 1afffffa
[16574.250436] 9220 e3530000 1a000001 f57ff04f e320f004 e1a0200d e3c23d7f e3c3303f e5932004
[16574.259346] 9240 e2422001 e5832004 e5933000 e3130002 012fff1e eafff856 f57ff05f e1903f9f
[16574.268312]
[16574.268314] LR: 0xc0341318:
[16574.272775] 1318 eaffffd9 e3530000 e5947084 1a000006 e594306c e3530000 0a000003 e1d322fa
[16574.281689] 1338 e594308c e1520003 0a000014 e2859048 e3a0001e e1a01009 ebfe83d6 e1a01009
[16574.290659] 1358 e3a0001f ebfe7a35 e1a00004 eb0de0d8 e1a00004 e597300c e12fff33 e1a00004
[16574.299574] 1378 e3a01000 e5973004 e12fff33 e1a00004 e5973018 e12fff33 e1a00004 eb0ddf8b
[16574.308490] 1398 e5973000 e1a00004 e12fff33 e3a09003 e3500000 e3a0000a 1a000009 e3590000
[16574.317457] 13b8 e2499001 0a000017 ebf575bf e5973000 e1a00004 e12fff33 e3500000 e3a0000a
[16574.326427] 13d8 0afffff5 e3590000 0a00000e e59a3000 e3530000 1a000006 e594306c e3530000
[16574.335398] 13f8 0a000003 e1d312fa e594208c e1510002 0affffb4 e5973028 e1a00004 e12fff33
[16574.344316]
[16574.344318] SP: 0xd183dd18:
[16574.348777] dd18 00000000 d183c000 c0046dd8 d183c000 0000003a 00000f12 c095e7d0 c004f1b4
[16574.357685] dd38 ffffffff 0000040f 00000406 d449c850 c098e75c c004e2d0 d4431c00 a0000093
[16574.366651] dd58 00004025 00000000 d4431c00 d449c800 d449c850 c098e75c c098e738 d449c848
[16574.375616] dd78 c097bda8 00000f12 00000000 d183dd98 c0341398 c06b91e0 60000013 ffffffff
[16574.384589] dd98 2210d037 00000000 d4431c00 c098e738 d4431c00 00000714 c06eed70 d40e143c
[16574.393503] ddb8 00000000 00000000 d5d7f237 c0342198 c0342144 d40e1408 c035046c c03504bc
[16574.402472] ddd8 c035046c c0353664 d183de23 a0000013 d5d7f237 00000f12 c098f000 d40e1408
[16574.411441] ddf8 c0a23df4 c0a23df4 c098f450 00000002 c098f420 c03541a0 00000000 20000013
[16574.420414]
[16574.420416] R0: 0xd4431b80:
[16574.424820] 1b80 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.433776] 1ba0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.442682] 1bc0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.451650] 1be0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.460616] 1c00 00000000 00000000 00000000 d98fe000 00000000 00000000 00000000 00000000
[16574.469580] 1c20 0000003a 00000000 04c4b400 00000020 00020000 00000000 00000000 d449c800
[16574.478482] 1c40 00000000 00000000 00000000 00000000 003ba22f 00000000 000000f8 00000000
[16574.487445] 1c60 00000000 000000d0 00000000 c098e808 00000000 10000000 00000006 00000005
[16574.496412]
[16574.496414] R4: 0xd4431b80:
[16574.500819] 1b80 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.509789] 1ba0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.518752] 1bc0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.527663] 1be0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16574.536624] 1c00 00000000 00000000 00000000 d98fe000 00000000 00000000 00000000 00000000
[16574.545594] 1c20 0000003a 00000000 04c4b400 00000020 00020000 00000000 00000000 d449c800
[16574.554508] 1c40 00000000 00000000 00000000 00000000 003ba22f 00000000 000000f8 00000000
[16574.563480] 1c60 00000000 000000d0 00000000 c098e808 00000000 10000000 00000006 00000005
[16574.572450]
[16574.572452] R5: 0xd449c780:
[16574.576858] c780 c08362c0 00000180 c0346620 c03466c0 c08362d0 00000180 c0346620 c03466c0
[16574.585825] c7a0 c08362e0 00000180 c0346620 c03466c0 c08362f0 00000180 c0346620 c03466c0
[16574.594792] c7c0 c0836300 00000180 c0346620 c03466c0 c0836310 00000180 c0346620 c03466c0
[16574.603705] c7e0 c0836320 00000180 c0346620 c03466c0 c0836330 00000180 c0346620 c03466c0
[16574.612667] c800 d0215000 c06edee8 00000000 00000000 00000000 00000001 00000000 00000000
[16574.621634] c820 d449c820 d449c820 00000000 00000000 d449c830 d449c830 00000000 00000000
[16574.630598] c840 d449c840 d449c840 60000000 00000000 00000000 00000000 00000000 d449c85c
[16574.639508] c860 d449c85c cedd5600 00000001 00000000 00000000 d449c874 d449c874 00000000
[16574.648416]
[16574.648418] R6: 0xd449c7d0:
[16574.652819] c7d0 c0836310 00000180 c0346620 c03466c0 c0836320 00000180 c0346620 c03466c0
[16574.661787] c7f0 c0836330 00000180 c0346620 c03466c0 d0215000 c06edee8 00000000 00000000
[16574.670755] c810 00000000 00000001 00000000 00000000 d449c820 d449c820 00000000 00000000
[16574.679718] c830 d449c830 d449c830 00000000 00000000 d449c840 d449c840 60000000 00000000
[16574.688624] c850 00000000 00000000 00000000 d449c85c d449c85c cedd5600 00000001 00000000
[16574.697537] c870 00000000 d449c874 d449c874 00000000 00000000 000001f4 00007530 00000000
[16574.706501] c890 00000001 00000000 d16df000 00000000 00000000 00000000 00000000 00000000
[16574.715473] c8b0 c033fbe8 d449c800 d4431c00 00000000 c06edee8 00000000 00000000 00000000
[16574.724381]
[16574.724383] R7: 0xc098e6dc:
[16574.728841] e6dc 00000010 c033e5b8 c087746c c0877480 00000008 c033e5c8 c087748c c0877494
[16574.737759] e6fc 00000020 c033e5c0 c08774ac c08774c4 00000008 c033e5b0 c08774d8 c08774f0
[16574.746672] e71c 00000008 00000001 00000000 00000000 c098e72c c098e72c 00000000 00000000
[16574.755634] e73c c0877900 c08779b8 000000cf 00000010 00000008 c098e808 d449c800 d418e460
[16574.764600] e75c c0341e34 c03438a0 c0341e48 c0341d9c c0343e50 00000000 c0341ddc c0343074
[16574.773519] e77c c03422bc c03439b0 c034231c 00000000 c0343088 00000000 00000000 00000000
[16574.782488] e79c 00000000 c0341e90 c0342288 c0342224 c0343e2c c0341eac 00000000 c0343448
[16574.791457] e7bc c03421a8 00000000 c0342144 c03420e4 c0835954 c098f000 00000000 00000000
[16574.800368]
[16574.800370] R8: 0xc098e6b8:
[16574.804829] e6b8 c08773fc 00000008 c033e5d0 c0877408 c087741c 00000000 c033e5cc c0877454
[16574.813797] e6d8 c087745c 00000010 c033e5b8 c087746c c0877480 00000008 c033e5c8 c087748c
[16574.822716] e6f8 c0877494 00000020 c033e5c0 c08774ac c08774c4 00000008 c033e5b0 c08774d8
[16574.831688] e718 c08774f0 00000008 00000001 00000000 00000000 c098e72c c098e72c 00000000
[16574.840652] e738 00000000 c0877900 c08779b8 000000cf 00000010 00000008 c098e808 d449c800
[16574.849566] e758 d418e460 c0341e34 c03438a0 c0341e48 c0341d9c c0343e50 00000000 c0341ddc
[16574.858541] e778 c0343074 c03422bc c03439b0 c034231c 00000000 c0343088 00000000 00000000
[16574.867507] e798 00000000 00000000 c0341e90 c0342288 c0342224 c0343e2c c0341eac 00000000
[16574.876550]
[16574.876551] R9: 0xd449c7c8:
[16574.880956] c7c8 c0346620 c03466c0 c0836310 00000180 c0346620 c03466c0 c0836320 00000180
[16574.889923] c7e8 c0346620 c03466c0 c0836330 00000180 c0346620 c03466c0 d0215000 c06edee8
[16574.898844] c808 00000000 00000000 00000000 00000001 00000000 00000000 d449c820 d449c820
[16574.907813] c828 00000000 00000000 d449c830 d449c830 00000000 00000000 d449c840 d449c840
[16574.916784] c848 60000000 00000000 00000000 00000000 00000000 d449c85c d449c85c cedd5600
[16574.925754] c868 00000001 00000000 00000000 d449c874 d449c874 00000000 00000000 000001f4
[16574.934665] c888 00007530 00000000 00000001 00000000 d16df000 00000000 00000000 00000000
[16574.943631] c8a8 00000000 00000000 c033fbe8 d449c800 d4431c00 00000000 c06edee8 00000000
[16574.952547]
[16574.952549] R10: 0xc097bd28:
[16574.957042] bd28 00000002 00000003 00000004 00000005 00000006 00000007 00000008 00000009
[16574.966011] bd48 0000000a 0000000b 0000000c 0000000d 0000000e 0000000f 00000010 00000011
[16574.974984] bd68 00000012 00000013 00000014 00000015 00000016 00000017 00000018 00000019
[16574.983902] bd88 0000001a 0000001b 0000001c 0000001d 0000001e 0000001f c09d34a4 00004000
[16574.992811] bda8 00000000 c097bdac c097bdac 00000000 00000000 000001f4 0000000a 00000002
[16575.001779] bdc8 00000000 0003c5cc 0000000f 00000004 00000001 00000007 00000000 00000000
[16575.010750] bde8 00000001 c097bdec c097bdec 00000000 00000000 00000000 c097be00 c097be00
[16575.019660] be08 00000004 ffffffff 00000000 00000001 ffffffff 00000000 c009175c c097a644
[16575.028634] Process kworker/u:26 (pid: 16833, stack limit = 0xd183c2f0)
[16575.035370] Stack: (0xd183dd98 to 0xd183e000)
[16575.039793] dd80: 2210d037 00000000
[16575.048094] dda0: d4431c00 c098e738 d4431c00 00000714 c06eed70 d40e143c 00000000 00000000
[16575.056339] ddc0: d5d7f237 c0342198 c0342144 d40e1408 c035046c c03504bc c035046c c0353664
[16575.064640] dde0: d183de23 a0000013 d5d7f237 00000f12 c098f000 d40e1408 c0a23df4 c0a23df4
[16575.072940] de00: c098f450 00000002 c098f420 c03541a0 00000000 20000013 00000000 00000000
[16575.081240] de20: 00354204 d40e1408 cedd5600 c09d7fbc c09b2c14 0018d990 c09d76e0 c035356c
[16575.089485] de40: d183de24 ffffffff ffffffff 00000000 00000000 00000000 00000000 00000000
[16575.097786] de60: d40e1470 00000000 d40e1408 c098f420 c0a23df4 c097e830 c098f420 c0354a04
[16575.106087] de80: 00000007 00000002 c8827941 00000f12 c8827941 00000f12 00000003 00000003
[16575.114332] dea0: 00000003 c09e9f50 d40aae00 00000000 c0047840 c09b8f28 00000089 c00ca8bc
[16575.122633] dec0: 00000003 c0838970 00000000 d40aae00 c097eac8 c0047840 c0047840 c00cac6c
[16575.130933] dee0: c097e8e8 c09e9f58 00001fff c00cbc50 c00aa42c c0047320 de00e55b 00000f12
[16575.139234] df00: c0047320 c0047320 00684c85 5caa04bc 33f278db c0047320 2c627275 00000004
[16575.147479] df20: 0000000a 0000000e 00000007 00000003 00000077 00000000 00000061 c09d8780
[16575.155779] df40: d4103e00 d5534860 d183c000 c09d8780 d40aae00 c00a9e64 00000004 00000000
[16575.164080] df60: c00cbbf4 d40aae05 c0047840 d5534860 c09d8780 c09d8788 d5534870 d183c000
[16575.172380] df80: c0047840 c0047840 00000089 c00aa33c 00000013 d183c000 c0047840 c0047840
[16575.180625] dfa0: 00000013 d0543f04 d5534860 c00aa1cc 00000013 00000000 00000000 00000000
[16575.188925] dfc0: 00000000 c00ae430 c004f408 00000000 d5534860 00000000 00000000 00000000
[16575.197226] dfe0: d183dfe0 d183dfe0 d0543f04 c00ae3b0 c004f408 c004f408 00000000 00000000
[16575.205484] [<c06b91e0>] (_raw_spin_unlock_irq+0x18/0x40) from [<c0341398>] (uart_suspend_port+0x1c0/0x2a4)
[16575.215356] [<c0341398>] (uart_suspend_port+0x1c0/0x2a4) from [<c0342198>] (serial_imx_suspend+0x54/0x64)
[16575.225052] [<c0342198>] (serial_imx_suspend+0x54/0x64) from [<c03504bc>] (platform_pm_suspend+0x50/0x5c)
[16575.234750] [<c03504bc>] (platform_pm_suspend+0x50/0x5c) from [<c0353664>] (pm_op+0x7c/0x104)
[16575.243403] [<c0353664>] (pm_op+0x7c/0x104) from [<c03541a0>] (__device_suspend+0x264/0x2c8)
[16575.251969] [<c03541a0>] (__device_suspend+0x264/0x2c8) from [<c0354a04>] (dpm_suspend+0x54/0x194)
[16575.261002] [<c0354a04>] (dpm_suspend+0x54/0x194) from [<c00ca8bc>] (suspend_devices_and_enter+0x78/0x344)
[16575.270781] [<c00ca8bc>] (suspend_devices_and_enter+0x78/0x344) from [<c00cac6c>] (enter_state+0xe4/0x134)
[16575.280563] [<c00cac6c>] (enter_state+0xe4/0x134) from [<c00cbc50>] (suspend+0x5c/0x194)
[16575.288785] [<c00cbc50>] (suspend+0x5c/0x194) from [<c00a9e64>] (process_one_work+0x12c/0x494)
[16575.297525] [<c00a9e64>] (process_one_work+0x12c/0x494) from [<c00aa33c>] (worker_thread+0x170/0x3cc)
[16575.306819] [<c00aa33c>] (worker_thread+0x170/0x3cc) from [<c00ae430>] (kthread+0x80/0x88)
[16575.315213] [<c00ae430>] (kthread+0x80/0x88) from [<c004f408>] (kernel_thread_exit+0x0/0x8)
[16575.323687] Code: e5803000 f57ff04f e320f004 f1080080 (e1a0200d)
[16575.329900] ---[ end trace f54ae59d5c310c0c ]---
[16575.334654] Kernel panic - not syncing: Fatal exception
[16575.339967] [<c0056044>] (unwind_backtrace+0x0/0x138) from [<c06b2244>] (panic+0x74/0x194)
[16575.348374] [<c06b2244>] (panic+0x74/0x194) from [<c00524d8>] (die+0x218/0x284)
[16575.355828] [<c00524d8>] (die+0x218/0x284) from [<c004847c>] (do_DataAbort+0x8c/0x9c)
[16575.363747] [<c004847c>] (do_DataAbort+0x8c/0x9c) from [<c004e2d0>] (__dabt_svc+0x70/0xa0)
[16575.372144] Exception stack(0xd183dd50 to 0xd183dd98)
[16575.377319] dd40: d4431c00 a0000093 00004025 00000000
[16575.385577] dd60: d4431c00 d449c800 d449c850 c098e75c c098e738 d449c848 c097bda8 00000f12
[16575.393888] dd80: 00000000 d183dd98 c0341398 c06b91e0 60000013 ffffffff
[16575.400634] [<c004e2d0>] (__dabt_svc+0x70/0xa0) from [<c06b91e0>] (_raw_spin_unlock_irq+0x18/0x40)
[16575.409681] [<c06b91e0>] (_raw_spin_unlock_irq+0x18/0x40) from [<c0341398>] (uart_suspend_port+0x1c0/0x2a4)
[16575.419566] [<c0341398>] (uart_suspend_port+0x1c0/0x2a4) from [<c0342198>] (serial_imx_suspend+0x54/0x64)
[16575.429274] [<c0342198>] (serial_imx_suspend+0x54/0x64) from [<c03504bc>] (platform_pm_suspend+0x50/0x5c)
[16575.438980] [<c03504bc>] (platform_pm_suspend+0x50/0x5c) from [<c0353664>] (pm_op+0x7c/0x104)
[16575.447642] [<c0353664>] (pm_op+0x7c/0x104) from [<c03541a0>] (__device_suspend+0x264/0x2c8)
[16575.456164] [<c03541a0>] (__device_suspend+0x264/0x2c8) from [<c0354a04>] (dpm_suspend+0x54/0x194)
[16575.465262] [<c0354a04>] (dpm_suspend+0x54/0x194) from [<c00ca8bc>] (suspend_devices_and_enter+0x78/0x344)
[16575.475053] [<c00ca8bc>] (suspend_devices_and_enter+0x78/0x344) from [<c00cac6c>] (enter_state+0xe4/0x134)
[16575.484842] [<c00cac6c>] (enter_state+0xe4/0x134) from [<c00cbc50>] (suspend+0x5c/0x194)
[16575.493073] [<c00cbc50>] (suspend+0x5c/0x194) from [<c00a9e64>] (process_one_work+0x12c/0x494)
[16575.501773] [<c00a9e64>] (process_one_work+0x12c/0x494) from [<c00aa33c>] (worker_thread+0x170/0x3cc)
[16575.511132] [<c00aa33c>] (worker_thread+0x170/0x3cc) from [<c00ae430>] (kthread+0x80/0x88)
[16575.519526] [<c00ae430>] (kthread+0x80/0x88) from [<c004f408>] (kernel_thread_exit+0x0/0x8)
[16586.141047] **** DPM device timeout: imx-uart.0 (imx-uart)
[16586.146601] dpm suspend stack:
[16586.149732] [<c0056044>] (unwind_backtrace+0x0/0x138) from [<c00522bc>] (show_stack+0x10/0x14)
[16586.158487] [<c00522bc>] (show_stack+0x10/0x14) from [<c03535ac>] (dpm_drv_timeout+0x40/0x5c)
[16586.167152] [<c03535ac>] (dpm_drv_timeout+0x40/0x5c) from [<c009df38>] (run_timer_softirq+0x134/0x3e4)
[16586.176602] [<c009df38>] (run_timer_softirq+0x134/0x3e4) from [<c00962b0>] (__do_softirq+0xc8/0x25c)
[16586.185875] [<c00962b0>] (__do_softirq+0xc8/0x25c) from [<c00968f8>] (irq_exit+0x98/0xa0)
[16586.194131] [<c00968f8>] (irq_exit+0x98/0xa0) from [<c004f1b4>] (handle_IRQ+0x50/0xac)
[16586.202180] [<c004f1b4>] (handle_IRQ+0x50/0xac) from [<c004e34c>] (__irq_svc+0x4c/0xe8)
[16586.210318] [<c004e34c>] (__irq_svc+0x4c/0xe8) from [<c02e0e10>] (__delay+0x0/0xc)
[16586.217966] kernel BUG at drivers/base/power/main.c:651!
[16586.223415] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[16586.231635] pgd = c0004000
[16586.234406] [00000000] *pgd=00000000
[16586.238123] Internal error: Oops: 805 [#2] PREEMPT SMP
[16586.243381] Modules linked in: wl12xx_sdio fio_usb wl12xx mac80211 cfg80211 mipi_ov5645
[16586.251979] CPU: 0 Tainted: G D W (3.0.35 #15)
[16586.257499] PC is at __bug+0x1c/0x28
[16586.261140] LR is at __bug+0x18/0x28
[16586.264781] pc : [<c0052070>] lr : [<c005206c>] psr: 20000113
[16586.264786] sp : d183db10 ip : 00000000 fp : 00000104
[16586.276454] r10: d183dc82 r9 : d183c000 r8 : c094a080
[16586.281799] r7 : d183c000 r6 : d183de2c r5 : c09d76e0 r4 : cedd5600
[16586.288448] r3 : 00000000 r2 : c097be00 r1 : 60000193 r0 : 00000042
[16586.295042] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[16586.302471] Control: 10c53c7d Table: 1e37404a DAC: 00000015
[16586.308280]
[16586.308282] PC: 0xc0051ff0:
[16586.312742] 1ff0 e1a04000 e24dd010 e590003c eb01c7bb e3500000 0594003c 0a00000d e2841034
[16586.321663] 2010 e594002c e891000e e88d000f ea000003 e59d000c eb01c7b1 e3500000 0a000006
[16586.330633] 2030 e1a0000d eb000eab e3500000 aafffff7 e3a00000 e28dd010 e8bd8010 e59d000c
[16586.339552] 2050 eafffffb e92d4008 e1a03000 e1a02001 e59f0010 e1a01003 eb1980bd e3a03000
[16586.348524] 2070 e5833000 eafffffe c082e788 e30e07a4 e30012e1 e92d4008 e34c0082 ebfffff0
[16586.357447] 2090 e1a01000 e30e07bc e92d4008 e34c0082 eb1980af e30e07a4 e30012c5 e34c0082
[16586.366422] 20b0 ebffffe7 e92d4008 e1a02000 e1a03001 e30e07dc e1a0100e e34c0082 eb1980a4
[16586.375394] 20d0 e30e07a4 e3001299 e34c0082 ebffffdc e92d4ff0 e24dd06c e1a06002 e1a08000
[16586.384315]
[16586.384317] LR: 0xc0051fec:
[16586.388776] 1fec e92d4010 e1a04000 e24dd010 e590003c eb01c7bb e3500000 0594003c 0a00000d
[16586.397747] 200c e2841034 e594002c e891000e e88d000f ea000003 e59d000c eb01c7b1 e3500000
[16586.406670] 202c 0a000006 e1a0000d eb000eab e3500000 aafffff7 e3a00000 e28dd010 e8bd8010
[16586.415644] 204c e59d000c eafffffb e92d4008 e1a03000 e1a02001 e59f0010 e1a01003 eb1980bd
[16586.424617] 206c e3a03000 e5833000 eafffffe c082e788 e30e07a4 e30012e1 e92d4008 e34c0082
[16586.433536] 208c ebfffff0 e1a01000 e30e07bc e92d4008 e34c0082 eb1980af e30e07a4 e30012c5
[16586.442508] 20ac e34c0082 ebffffe7 e92d4008 e1a02000 e1a03001 e30e07dc e1a0100e e34c0082
[16586.451478] 20cc eb1980a4 e30e07a4 e3001299 e34c0082 ebffffdc e92d4ff0 e24dd06c e1a06002
[16586.460446]
[16586.460448] SP: 0xd183da90:
[16586.464853] da90 00000002 315ba080 36383536 3731322e 5d363639 c06b0020 00000000 d183dabc
[16586.473827] dab0 00000000 0000040f 00000005 d183de2c d183c000 c004e2d0 00000042 60000193
[16586.482742] dad0 c097be00 00000000 cedd5600 c09d76e0 d183de2c d183c000 c094a080 d183c000
[16586.491715] daf0 d183dc82 00000104 00000000 d183db10 c005206c c0052070 20000113 ffffffff
[16586.500692] db10 00000002 c03535b8 d183db38 c009df38 00000001 c094cccc 00200200 c035356c
[16586.509663] db30 d183de24 d183db38 d183db38 d183db38 d183c000 00000101 c094a044 d183c000
[16586.518588] db50 00000057 00000001 d183c000 d183dc82 00000104 c00962b0 00000057 00000000
[16586.527553] db70 00000000 0000000a c094cccc d183c000 c0046dd8 d183c000 00000057 00000000
[16586.536528]
[16586.536530] R2: 0xc097bd80:
[16586.540935] bd80 00000018 00000019 0000001a 0000001b 0000001c 0000001d 0000001e 0000001f
[16586.549908] bda0 c09d34a4 00004000 00000000 c097bdac c097bdac 00000000 00000000 000001f4
[16586.558878] bdc0 0000000a 00000002 00000000 0003c5cc 0000000f 00000004 00000001 00000007
[16586.567793] bde0 00000000 00000000 00000001 c097bdec c097bdec 00000000 00000000 00000000
[16586.576766] be00 c097be00 c097be00 00000004 ffffffff 00000000 00000001 ffffffff 00000000
[16586.585740] be20 c009175c c097a644 00000000 00000000 00000001 00000000 00000000 c097be3c
[16586.594655] be40 c097be3c 00000000 00000000 00000001 00000000 00000000 c097be58 c097be58
[16586.603573] be60 00000000 00000000 c0838794 c0838798 c08387a0 c08387a8 c08387b0 c08387b8
[16586.612542]
[16586.612545] R4: 0xcedd5580:
[16586.616950] 5580 cedd557c 00000000 cedd5588 cedd5588 00000000 00000000 00000000 00000001
[16586.625921] 55a0 00000000 00000000 cedd55a8 cedd55a8 00000000 cedd55b4 cedd55b4 00000000
[16586.634891] 55c0 d2ac20cc c0091bf8 00000000 00000000 00000000 00000000 00000000 00000000
[16586.643811] 55e0 0000c350 0000c350 00000000 00000000 00000000 00000000 00000000 00000000
[16586.652728] 5600 00000000 d183c000 00000002 84208060 00000000 00000000 00000001 00000001
[16586.661702] 5620 00000078 00000078 00000078 00000000 c06bb9f4 00000000 00000400 00400000
[16586.670674] 5640 00000001 00000000 00000000 c13643a0 d5c3068c 00000001 f619ccf1 00000f12
[16586.679587] 5660 a6d69a2d 00000000 353fae39 00000699 a6d33c32 00000000 00000000 00000000
[16586.688557]
[16586.688559] R5: 0xc09d7660:
[16586.693021] 7660 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.701938] 7680 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.710910] 76a0 00000000 00000001 00000000 00000000 00000000 00000000 00000000 00000000
[16586.719878] 76c0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.728788] 76e0 00000000 00000000 d183de2c 0018d991 0018d4d2 c09d76f4 c09d76f4 c09d76fc
[16586.737759] 7700 c09d76fc c09d7704 c09d7704 c09d770c c09d770c c09d7714 c09d7714 c09d771c
[16586.746730] 7720 c09d771c c09d7724 c09d7724 c09d772c c09d772c c09d7734 c09d7734 c09d773c
[16586.755704] 7740 c09d773c c09d7744 c09d7744 c09d774c c09d774c c09d7754 c09d7754 c09d775c
[16586.764625]
[16586.764627] R6: 0xd183ddac:
[16586.769088] ddac 00000714 c06eed70 d40e143c 00000000 00000000 d5d7f237 c0342198 c0342144
[16586.778006] ddcc d40e1408 c035046c c03504bc c035046c c0353664 d183de23 a0000013 d5d7f237
[16586.786977] ddec 00000f12 c098f000 d40e1408 c0a23df4 c0a23df4 c098f450 00000002 c098f420
[16586.795947] de0c c03541a0 00000000 20000013 00000000 00000000 00354204 d40e1408 cedd5600
[16586.804919] de2c 00000000 00200200 0018d990 c09d76e0 c035356c d183de24 ffffffff ffffffff
[16586.813832] de4c 00000000 00000000 00000000 00000000 00000000 d40e1470 00000000 d40e1408
[16586.822797] de6c c098f420 c0a23df4 c097e830 c098f420 c0354a04 00000007 00000002 c8827941
[16586.831760] de8c 00000f12 c8827941 00000f12 00000003 00000003 00000003 c09e9f50 d40aae00
[16586.840683]
[16586.840685] R7: 0xd183bf80:
[16586.845089] bf80 00650076 00690070 006b0063 00720065 00000000 ffffffff 00000020 006f0063
[16586.854059] bfa0 002e006d 006e0061 00720064 0069006f 002e0064 00610077 006c006c 00610070
[16586.862971] bfc0 00650070 002e0072 0069006c 00650076 00690070 006b0063 00720065 00000000
[16586.871941] bfe0 ffffffff 00000000 00c8be45 00000000 00000000 00000000 00000024 0073002f
[16586.880909] c000 00000002 00000106 00000000 cedd5600 c097bcf4 00000000 00000015 cedd5600
[16586.889823] c020 c1364320 00000000 d183c000 f702e336 d5c30640 cedd58a0 d183dd8c d183dcd8
[16586.898736] c040 c06b6da0 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.907706] c060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.916678]
[16586.916680] R8: 0xc094a000:
[16586.921086] a000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.930057] a020 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.938974] a040 c00959fc c009de04 c055af4c c055f3a8 c02d6dc0 c02d74f0 c0095bd4 c0087dbc
[16586.947893] a060 c00b31b0 c00ddd20 00000000 00000000 00000000 00000000 00000000 00000000
[16586.956942] a080 0018d999 00000001 00000000 00000000 00000000 00000000 00000000 00000000
[16586.965915] a0a0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.974832] a0c0 0020a9e4 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16586.983804] a0e0 c094a0e0 c094a0e0 00000000 00000000 00000000 00000000 00000000 00000000
[16586.992721]
[16586.992724] R9: 0xd183bf80:
[16586.997129] bf80 00650076 00690070 006b0063 00720065 00000000 ffffffff 00000020 006f0063
[16587.006102] bfa0 002e006d 006e0061 00720064 0069006f 002e0064 00610077 006c006c 00610070
[16587.015075] bfc0 00650070 002e0072 0069006c 00650076 00690070 006b0063 00720065 00000000
[16587.023985] bfe0 ffffffff 00000000 00c8be45 00000000 00000000 00000000 00000024 0073002f
[16587.032955] c000 00000002 00000106 00000000 cedd5600 c097bcf4 00000000 00000015 cedd5600
[16587.041873] c020 c1364320 00000000 d183c000 f702e336 d5c30640 cedd58a0 d183dd8c d183dcd8
[16587.050846] c040 c06b6da0 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16587.059761] c060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[16587.068732]
[16587.068734] R10: 0xd183dc02:
[16587.073224] dc00 20000113 ffffffff c082e8ac d183dc34 c082e8ac d183c000 00000001 00000001
[16587.082197] dc20 c06b91e2 00000000 d183dc82 c00524d8 c082e95c 20000113 d183dc38 00000001
[16587.091166] dc40 d183c2f0 0000000b 00000008 00000000 65000f12 33303835 20303030 66373566
[16587.100139] dc60 66343066 32336520 30306630 31662034 30303830 28203038 30613165 64303032
[16587.109052] dc80 20002029 c097bda8 00000f12 00001406 00030003 6cee4c78 d183dd50 c098e738
[16587.118021] dca0 20000113 c097bda8 00000f12 c004847c 00000000 00002410 00000007 00000000
[16587.126989] dcc0 00030003 6cee4c78 00000000 d183c000 d183c000 c00d8918 d183c000 c00dd9c4
[16587.135906] dce0 00000000 c094be00 d5c30640 c094be00 c094be4c d59e9ca0 0000003a 00000000
[16587.144822] dd00 d183c000 c094be00 c094be4c c00d8b34 c005d0b0 c094be00 00000000 d183c000
[16587.153795] Process kworker/u:26 (pid: 16833, stack limit = 0xd183c2f0)
[16587.160529] Stack: (0xd183db10 to 0xd183e000)
[16587.164952] db00: 00000002 c03535b8 d183db38 c009df38
[16587.173253] db20: 00000001 c094cccc 00200200 c035356c d183de24 d183db38 d183db38 d183db38
[16587.181499] db40: d183c000 00000101 c094a044 d183c000 00000057 00000001 d183c000 d183dc82
[16587.189800] db60: 00000104 c00962b0 00000057 00000000 00000000 0000000a c094cccc d183c000
[16587.198100] db80: c0046dd8 d183c000 00000057 00000000 d183c000 d183dc82 c082e8ac c00968f8
[16587.206401] dba0: c095e7d0 c004f1b4 ffffffff f2a00100 00000057 00000003 00000002 c004e34c
[16587.214647] dbc0: 00099d28 ffffffff 000025e3 c008f5c0 00002a30 00000000 00000042 00002968
[16587.222947] dbe0: c09d2b80 c06b91e4 d183dc82 c082e8ac 00000000 d183dc08 c06b2338 c02e0e10
[16587.231248] dc00: 20000113 ffffffff c082e8ac d183dc34 c082e8ac d183c000 00000001 00000001
[16587.239493] dc20: c06b91e2 00000000 d183dc82 c00524d8 c082e95c 20000113 d183dc38 00000001
[16587.247794] dc40: d183c2f0 0000000b 00000008 00000000 65000f12 33303835 20303030 66373566
[16587.256094] dc60: 66343066 32336520 30306630 31662034 30303830 28203038 30613165 64303032
[16587.264396] dc80: 20002029 c097bda8 00000f12 00001406 00030003 6cee4c78 d183dd50 c098e738
[16587.272642] dca0: 20000113 c097bda8 00000f12 c004847c 00000000 00002410 00000007 00000000
[16587.280944] dcc0: 00030003 6cee4c78 00000000 d183c000 d183c000 c00d8918 d183c000 c00dd9c4
[16587.289245] dce0: 00000000 c094be00 d5c30640 c094be00 c094be4c d59e9ca0 0000003a 00000000
[16587.297546] dd00: d183c000 c094be00 c094be4c c00d8b34 c005d0b0 c094be00 00000000 d183c000
[16587.305791] dd20: c0046dd8 d183c000 0000003a 00000f12 c095e7d0 c004f1b4 ffffffff 0000040f
[16587.314093] dd40: 00000406 d449c850 c098e75c c004e2d0 d4431c00 a0000093 00004025 00000000
[16587.322394] dd60: d4431c00 d449c800 d449c850 c098e75c c098e738 d449c848 c097bda8 00000f12
[16587.330641] dd80: 00000000 d183dd98 c0341398 c06b91e0 60000013 ffffffff 2210d037 00000000
[16587.338942] dda0: d4431c00 c098e738 d4431c00 00000714 c06eed70 d40e143c 00000000 00000000
[16587.347241] ddc0: d5d7f237 c0342198 c0342144 d40e1408 c035046c c03504bc c035046c c0353664
[16587.355539] dde0: d183de23 a0000013 d5d7f237 00000f12 c098f000 d40e1408 c0a23df4 c0a23df4
[16587.363785] de00: c098f450 00000002 c098f420 c03541a0 00000000 20000013 00000000 00000000
[16587.372084] de20: 00354204 d40e1408 cedd5600 00000000 00200200 0018d990 c09d76e0 c035356c
[16587.380386] de40: d183de24 ffffffff ffffffff 00000000 00000000 00000000 00000000 00000000
[16587.388688] de60: d40e1470 00000000 d40e1408 c098f420 c0a23df4 c097e830 c098f420 c0354a04
[16587.396934] de80: 00000007 00000002 c8827941 00000f12 c8827941 00000f12 00000003 00000003
[16587.405235] dea0: 00000003 c09e9f50 d40aae00 00000000 c0047840 c09b8f28 00000089 c00ca8bc
[16587.413537] dec0: 00000003 c0838970 00000000 d40aae00 c097eac8 c0047840 c0047840 c00cac6c
[16587.421783] dee0: c097e8e8 c09e9f58 00001fff c00cbc50 c00aa42c c0047320 de00e55b 00000f12
[16587.430084] df00: c0047320 c0047320 00684c85 5caa04bc 33f278db c0047320 2c627275 00000004
[16587.438385] df20: 0000000a 0000000e 00000007 00000003 00000077 00000000 00000061 c09d8780
[16587.446686] df40: d4103e00 d5534860 d183c000 c09d8780 d40aae00 c00a9e64 00000004 00000000
[16587.454931] df60: c00cbbf4 d40aae05 c0047840 d5534860 c09d8780 c09d8788 d5534870 d183c000
[16587.463233] df80: c0047840 c0047840 00000089 c00aa33c 00000013 d183c000 c0047840 c0047840
[16587.471534] dfa0: 00000013 d0543f04 d5534860 c00aa1cc 00000013 00000000 00000000 00000000
[16587.479834] dfc0: 00000000 c00ae430 c004f408 00000000 d5534860 00000000 00000000 00000000
[16587.488082] dfe0: d183dfe0 d183dfe0 d0543f04 c00ae3b0 c004f408 c004f408 00000000 00000000
[16587.496393] [<c0052070>] (__bug+0x1c/0x28) from [<c03535b8>] (dpm_drv_timeout+0x4c/0x5c)
[16587.504612] [<c03535b8>] (dpm_drv_timeout+0x4c/0x5c) from [<c009df38>] (run_timer_softirq+0x134/0x3e4)
[16587.514047] [<c009df38>] (run_timer_softirq+0x134/0x3e4) from [<c00962b0>] (__do_softirq+0xc8/0x25c)
[16587.523251] [<c00962b0>] (__do_softirq+0xc8/0x25c) from [<c00968f8>] (irq_exit+0x98/0xa0)
[16587.531556] [<c00968f8>] (irq_exit+0x98/0xa0) from [<c004f1b4>] (handle_IRQ+0x50/0xac)
[16587.539597] [<c004f1b4>] (handle_IRQ+0x50/0xac) from [<c004e34c>] (__irq_svc+0x4c/0xe8)
[16587.547673] [<c004e34c>] (__irq_svc+0x4c/0xe8) from [<c02e0e10>] (__delay+0x0/0xc)
[16587.555367] Code: e59f0010 e1a01003 eb1980bd e3a03000 (e5833000)
[16587.561599] ---[ end trace f54ae59d5c310c0d ]---
[16587.566284] Kernel panic - not syncing: Fatal exception in interrupt
[16587.572784] [<c0056044>] (unwind_backtrace+0x0/0x138) from [<c06b2244>] (panic+0x74/0x194)
[16587.581137] [<c06b2244>] (panic+0x74/0x194) from [<c00524e0>] (die+0x220/0x284)
[16587.588577] [<c00524e0>] (die+0x220/0x284) from [<c06b1604>] (__do_kernel_fault.part.3+0x54/0x74)
[16587.597592] [<c06b1604>] (__do_kernel_fault.part.3+0x54/0x74) from [<c0059e10>] (do_page_fault+0x2cc/0x334)
[16587.607474] [<c0059e10>] (do_page_fault+0x2cc/0x334) from [<c0048424>] (do_DataAbort+0x34/0x9c)
[16587.616254] [<c0048424>] (do_DataAbort+0x34/0x9c) from [<c004e2d0>] (__dabt_svc+0x70/0xa0)
[16587.624649] Exception stack(0xd183dac8 to 0xd183db10)
[16587.629822] dac0: 00000042 60000193 c097be00 00000000 cedd5600 c09d76e0
[16587.638078] dae0: d183de2c d183c000 c094a080 d183c000 d183dc82 00000104 00000000 d183db10
[16587.646387] db00: c005206c c0052070 20000113 ffffffff
[16587.651573] [<c004e2d0>] (__dabt_svc+0x70/0xa0) from [<c0052070>] (__bug+0x1c/0x28)
[16587.659303] [<c0052070>] (__bug+0x1c/0x28) from [<c03535b8>] (dpm_drv_timeout+0x4c/0x5c)
[16587.667532] [<c03535b8>] (dpm_drv_timeout+0x4c/0x5c) from [<c009df38>] (run_timer_softirq+0x134/0x3e4)
[16587.676976] [<c009df38>] (run_timer_softirq+0x134/0x3e4) from [<c00962b0>] (__do_softirq+0xc8/0x25c)
[16587.686245] [<c00962b0>] (__do_softirq+0xc8/0x25c) from [<c00968f8>] (irq_exit+0x98/0xa0)
[16587.694502] [<c00968f8>] (irq_exit+0x98/0xa0) from [<c004f1b4>] (handle_IRQ+0x50/0xac)
[16587.702554] [<c004f1b4>] (handle_IRQ+0x50/0xac) from [<c004e34c>] (__irq_svc+0x4c/0xe8)
[16587.710687] [<c004e34c>] (__irq_svc+0x4c/0xe8) from [<c02e0e10>] (__delay+0x0/0xc)

[igorpadykov]

Hi Jeffery

one can try nxp official sources from source.codeaurora.org/external/imx repository

and check low power driver (description can be found in Chapter 16 Low-level

Power Management (PM) Driver attached Linux Manual)

mx6_suspend.S\mach-mx6\arm\arch - linux-imx - i.MX Linux kernel 

General recommendation is to upgrade to L3.0.101 : linux-imx - i.MX Linux kernel 

or better to use latest L4.9.88 : linux-imx - i.MX Linux kernel 

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
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[jeffreychang]

Dear Igor,

Thank you for the prompt response.

I have compared your mx6_suspend.S with ours and both files are exactly the same.

We are currently in the final stage of product development so I am afraid that we cannot upgrade the Linux kernel version now. Are there kernel patches or errata which are related to spinlock crash in the new versions? 

[igorpadykov]

Hi Jeffrey

there are no special patches for that error, one can try to reproduce issue on i.MX6DL Sabre SD

board and check suggestions on

https://community.nxp.com/thread/467546 

Best regards
igor