Kernel hang during boot-up

I got this errors while booting. Any idea what does it mean? The system is running on imx8DX board, kernel: Linux imx8dx_ccu 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1 SMP PREEMPT

It looks to me like failure when i boot the board It does not happen everytime but once in a while after that i switch off the board and it continues working until the issue happens again

[    1.745247] cdc_acm 1-1:1.8: ttyACM4: USB ACM device
[    1.764753] cdc_acm 1-1:1.10: ttyACM5: USB ACM device
[  242.773343] INFO: task swapper/0:1 blocked for more than 120 seconds.
[  242.779810]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  242.786528] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  242.794371] swapper/0       D    0     1      0 0x00000020
[  242.799870] Call trace:
[  242.802341] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  242.807498] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  242.812740] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  242.817635] [<ffff00000847b514>] rpm_resume+0xb4/0x5e8
[  242.822793] [<ffff00000847ba98>] __pm_runtime_resume+0x50/0x78
[  242.828638] [<ffff000008537db8>] lpi2c_imx_xfer+0x28/0x580
[  242.834140] [<ffff000008532964>] __i2c_transfer+0x11c/0x260
[  242.839734] [<ffff000008532b08>] i2c_transfer+0x60/0xc8
[  242.844972] [<ffff0000085307dc>] pcf8563_read_block_data+0x5c/0xa0
[  242.851166] [<ffff000008530c04>] pcf8563_clkout_is_prepared+0x1c/0x30
[  242.857620] [<ffff0000083f30d8>] clk_unprepare_unused_subtree+0x58/0x88
[  242.864248] [<ffff0000083f31a4>] clk_disable_unused+0x9c/0x148
[  242.870096] [<ffff000008083490>] do_one_initcall+0x38/0x128
[  242.875684] [<ffff000008a00cf0>] kernel_init_freeable+0x188/0x22c
[  242.881799] [<ffff0000087a8720>] kernel_init+0x10/0x100
[  242.887036] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  242.892363] INFO: task kworker/0:1:32 blocked for more than 120 seconds.
[  242.899074]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  242.905786] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  242.913632] kworker/0:1     D    0    32      2 0x00000000
[  242.919139] Workqueue: pm pm_runtime_work
[  242.923160] Call trace:
[  242.925617] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  242.930769] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  242.936008] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  242.940898] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  242.947268] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  242.953285] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  242.959306] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  242.964370] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  242.969956] [<ffff0000083f2ed0>] clk_unprepare+0x20/0x40
[  242.975289] [<ffff0000084583ac>] lpuart_runtime_suspend+0x24/0x48
[  242.981401] [<ffff000008479538>] pm_generic_runtime_suspend+0x28/0x40
[  242.987855] [<ffff000008487b98>] genpd_runtime_suspend+0x88/0x240
[  242.993962] [<ffff00000847bbf0>] __rpm_callback+0xe0/0x268
[  242.999461] [<ffff00000847bd98>] rpm_callback+0x20/0x80
[  243.004698] [<ffff00000847c054>] rpm_suspend+0xf4/0x4b8
[  243.009939] [<ffff00000847c940>] pm_runtime_work+0x78/0xb8
[  243.015439] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  243.021194] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  243.026612] [<ffff0000080e956c>] kthread+0x12c/0x130
[  243.031595] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  243.036918] INFO: task kworker/1:1:46 blocked for more than 120 seconds.
[  243.043633]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  243.050346] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  243.058192] kworker/1:1     D    0    46      2 0x00000000
[  243.063697] Workqueue: events dbs_work_handler
[  243.068154] Call trace:
[  243.070611] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  243.075764] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  243.081002] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  243.085894] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  243.092262] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  243.098279] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  243.104300] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  243.109365] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  243.114950] [<ffff0000083f2a6c>] clk_core_get_rate+0x14/0x80
[  243.120624] [<ffff0000083f32fc>] clk_get_rate+0x14/0x28
[  243.125864] [<ffff00000855360c>] imx8_set_target+0x94/0xb0
[  243.131363] [<ffff00000854a7f0>] __cpufreq_driver_target+0x158/0x538
[  243.137731] [<ffff00000854ea3c>] od_dbs_update+0xbc/0x1a0
[  243.143143] [<ffff00000855152c>] dbs_work_handler+0x3c/0x70
[  243.148727] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  243.154489] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  243.159902] [<ffff0000080e956c>] kthread+0x12c/0x130
[  243.164878] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  243.170212] INFO: task kworker/1:2:839 blocked for more than 120 seconds.
[  243.177017]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  243.183727] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  243.191572] kworker/1:2     D    0   839      2 0x00000000
[  243.197075] Workqueue: pm pm_runtime_work
[  243.201092] Call trace:
[  243.203555] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  243.208709] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  243.213947] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  243.218838] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  243.225207] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  243.231225] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  243.237245] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  243.242308] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  243.247896] [<ffff0000083f2ed0>] clk_unprepare+0x20/0x40
[  243.253226] [<ffff000008577198>] sdhci_esdhc_runtime_suspend+0xf0/0x108
[  243.259859] [<ffff000008479538>] pm_generic_runtime_suspend+0x28/0x40
[  243.266316] [<ffff000008487b98>] genpd_runtime_suspend+0x88/0x240
[  243.272423] [<ffff00000847bbf0>] __rpm_callback+0xe0/0x268
[  243.277921] [<ffff00000847bdcc>] rpm_callback+0x54/0x80
[  243.283160] [<ffff00000847c054>] rpm_suspend+0xf4/0x4b8
[  243.288399] [<ffff00000847c940>] pm_runtime_work+0x78/0xb8
[  243.293897] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  243.299656] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  243.305070] [<ffff0000080e956c>] kthread+0x12c/0x130
[  243.310047] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  243.315371] INFO: task kworker/0:2:841 blocked for more than 120 seconds.
[  243.322171]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  243.328886] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  243.336731] kworker/0:2     D    0   841      2 0x00000000
[  243.342235] Workqueue: pm pm_runtime_work
[  243.346260] Call trace:
[  243.348714] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  243.353867] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  243.359107] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  243.363998] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  243.370365] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  243.376388] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  243.382414] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  243.387477] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  243.393065] [<ffff0000083f2ed0>] clk_unprepare+0x20/0x40
[  243.398391] [<ffff000008537a88>] lpi2c_runtime_suspend+0x38/0x68
[  243.404410] [<ffff000008479538>] pm_generic_runtime_suspend+0x28/0x40
[  243.410867] [<ffff000008487b98>] genpd_runtime_suspend+0x88/0x240
[  243.416974] [<ffff00000847bbf0>] __rpm_callback+0xe0/0x268
[  243.422473] [<ffff00000847bd98>] rpm_callback+0x20/0x80
[  243.427711] [<ffff00000847c054>] rpm_suspend+0xf4/0x4b8
[  243.432950] [<ffff00000847c940>] pm_runtime_work+0x78/0xb8
[  243.438449] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  243.444208] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  243.449621] [<ffff0000080e956c>] kthread+0x12c/0x130
[  243.454599] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  243.459923] INFO: task kworker/0:3:844 blocked for more than 120 seconds.
[  243.466722]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  243.473437] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  243.481282] kworker/0:3     D    0   844      2 0x00000000
[  243.486787] Workqueue: pm pm_runtime_work
[  243.490812] Call trace:
[  243.493265] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  243.498420] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  243.503656] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  243.508550] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  243.514918] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  243.520934] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  243.526956] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  243.532021] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  243.537607] [<ffff0000083f2ed0>] clk_unprepare+0x20/0x40
[  243.542935] [<ffff000008577198>] sdhci_esdhc_runtime_suspend+0xf0/0x108
[  243.549561] [<ffff000008479538>] pm_generic_runtime_suspend+0x28/0x40
[  243.556018] [<ffff000008487b98>] genpd_runtime_suspend+0x88/0x240
[  243.562123] [<ffff00000847bbf0>] __rpm_callback+0xe0/0x268
[  243.567622] [<ffff00000847bd98>] rpm_callback+0x20/0x80
[  243.572862] [<ffff00000847c054>] rpm_suspend+0xf4/0x4b8
[  243.578105] [<ffff00000847c940>] pm_runtime_work+0x78/0xb8
[  243.583607] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  243.589368] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  243.594781] [<ffff0000080e956c>] kthread+0x12c/0x130
[  243.599757] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  243.605084] INFO: task kworker/0:5:911 blocked for more than 120 seconds.
[  243.611883]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  243.618596] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  243.626441] kworker/0:5     D    0   911      2 0x00000000
[  243.631944] Workqueue: pm pm_runtime_work
[  243.635962] Call trace:
[  243.638426] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  243.643579] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  243.648816] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  243.653709] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  243.660077] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  243.666095] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  243.672115] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  243.677180] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  243.682767] [<ffff0000083f2ed0>] clk_unprepare+0x20/0x40
[  243.688093] [<ffff0000084583ac>] lpuart_runtime_suspend+0x24/0x48
[  243.694199] [<ffff000008479538>] pm_generic_runtime_suspend+0x28/0x40
[  243.700656] [<ffff000008487b98>] genpd_runtime_suspend+0x88/0x240
[  243.706763] [<ffff00000847bbf0>] __rpm_callback+0xe0/0x268
[  243.712261] [<ffff00000847bd98>] rpm_callback+0x20/0x80
[  243.717501] [<ffff00000847c054>] rpm_suspend+0xf4/0x4b8
[  243.722739] [<ffff00000847c940>] pm_runtime_work+0x78/0xb8
[  243.728236] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  243.733998] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  243.739410] [<ffff0000080e956c>] kthread+0x12c/0x130
[  243.744386] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  365.653346] INFO: task swapper/0:1 blocked for more than 120 seconds.
[  365.659801]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  365.666513] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  365.674357] swapper/0       D    0     1      0 0x00000020
[  365.679854] Call trace:
[  365.682310] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  365.687463] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  365.692701] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  365.697592] [<ffff00000847b514>] rpm_resume+0xb4/0x5e8
[  365.702743] [<ffff00000847ba98>] __pm_runtime_resume+0x50/0x78
[  365.708589] [<ffff000008537db8>] lpi2c_imx_xfer+0x28/0x580
[  365.714090] [<ffff000008532964>] __i2c_transfer+0x11c/0x260
[  365.719676] [<ffff000008532b08>] i2c_transfer+0x60/0xc8
[  365.724914] [<ffff0000085307dc>] pcf8563_read_block_data+0x5c/0xa0
[  365.731109] [<ffff000008530c04>] pcf8563_clkout_is_prepared+0x1c/0x30
[  365.737563] [<ffff0000083f30d8>] clk_unprepare_unused_subtree+0x58/0x88
[  365.744190] [<ffff0000083f31a4>] clk_disable_unused+0x9c/0x148
[  365.750037] [<ffff000008083490>] do_one_initcall+0x38/0x128
[  365.755626] [<ffff000008a00cf0>] kernel_init_freeable+0x188/0x22c
[  365.761732] [<ffff0000087a8720>] kernel_init+0x10/0x100
[  365.766970] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  365.772297] INFO: task kworker/0:1:32 blocked for more than 120 seconds.
[  365.779007]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  365.785721] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  365.793566] kworker/0:1     D    0    32      2 0x00000000
[  365.799070] Workqueue: pm pm_runtime_work
[  365.803087] Call trace:
[  365.805542] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  365.810695] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  365.815933] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  365.820825] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  365.827193] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  365.833211] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  365.839231] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  365.844296] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  365.849883] [<ffff0000083f2ed0>] clk_unprepare+0x20/0x40
[  365.855213] [<ffff0000084583ac>] lpuart_runtime_suspend+0x24/0x48
[  365.861326] [<ffff000008479538>] pm_generic_runtime_suspend+0x28/0x40
[  365.867781] [<ffff000008487b98>] genpd_runtime_suspend+0x88/0x240
[  365.873888] [<ffff00000847bbf0>] __rpm_callback+0xe0/0x268
[  365.879386] [<ffff00000847bd98>] rpm_callback+0x20/0x80
[  365.884625] [<ffff00000847c054>] rpm_suspend+0xf4/0x4b8
[  365.889864] [<ffff00000847c940>] pm_runtime_work+0x78/0xb8
[  365.895362] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  365.901121] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  365.906535] [<ffff0000080e956c>] kthread+0x12c/0x130
[  365.911512] [<ffff0000080846d8>] ret_from_fork+0x10/0x18
[  365.916836] INFO: task kworker/1:1:46 blocked for more than 120 seconds.
[  365.923550]       Not tainted 4.14.62-imx_4.14.62_1.0.0_beta+g1907fe4 #1
[  365.930264] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  365.938108] kworker/1:1     D    0    46      2 0x00000000
[  365.943612] Workqueue: events dbs_work_handler
[  365.948064] Call trace:
[  365.950519] [<ffff00000808532c>] __switch_to+0x94/0xd8
[  365.955672] [<ffff0000087a989c>] __schedule+0x18c/0x5c0
[  365.960910] [<ffff0000087a9d08>] schedule+0x38/0xa0
[  365.965802] [<ffff0000087aa1e8>] schedule_preempt_disabled+0x20/0x38
[  365.972170] [<ffff0000087aae48>] __mutex_lock.isra.0+0x140/0x530
[  365.978188] [<ffff0000087ab248>] __mutex_lock_slowpath+0x10/0x18
[  365.984208] [<ffff0000087ab280>] mutex_lock+0x30/0x38
[  365.989273] [<ffff0000083f14e0>] clk_prepare_lock+0x40/0xa0
[  365.994859] [<ffff0000083f2a6c>] clk_core_get_rate+0x14/0x80
[  366.000532] [<ffff0000083f32fc>] clk_get_rate+0x14/0x28
[  366.005772] [<ffff00000855360c>] imx8_set_target+0x94/0xb0
[  366.011272] [<ffff00000854a7f0>] __cpufreq_driver_target+0x158/0x538
[  366.017638] [<ffff00000854ea3c>] od_dbs_update+0xbc/0x1a0
[  366.023051] [<ffff00000855152c>] dbs_work_handler+0x3c/0x70
[  366.028636] [<ffff0000080e3614>] process_one_work+0x1d4/0x348
[  366.034397] [<ffff0000080e37d0>] worker_thread+0x48/0x470
[  366.039809] [<ffff0000080e956c>] kthread+0x12c/0x130
[  366.044787] [<ffff0000080846d8>] ret_from_fork+0x10/0x18