Subject: Re: 4.18.0-rc1-next-20180619 boot failed on beagle board x15

From: Tony Lindgren <[email-masked]>
Date: Wed, 20 Jun 2018 03:29:04 -0700

Hi,

* Naresh Kamboju <[email-masked]> [180620 05:55]:
> Linux next (4.18.0-rc1-next-20180619) boot failed on beagle board x15.

Bisect points to commit aece27a2f01b ("ata: ahci_platform: allow disabling of
hotplug to save power").

Reverting the patch makes things work again. Any ideas what
might be going wrong here? Things clearly idle but then there
seems to be some register access with clocks disabled.

> Full log of trace please refer this link,
> https://lkft.validation.linaro.org/scheduler/job/291535#L946
> 
> Here is back trace,
> [    3.561640] omap_rng 48090000.rng: Random Number Generator ver. 20
> [    3.611949] brd: module loaded
> [    3.641298] loop: module loaded
> [    3.646435] at24 0-0050: 4096 byte 24c32 EEPROM, writable, 1 bytes/write
> [    3.658481] ------------[ cut here ]------------
> [    3.663196] WARNING: CPU: 0 PID: 1 at
> /srv/oe/build/tmp-rpb-glibc/work-shared/am57xx-evm/kernel-source/drivers/bus/omap_l3_noc.c:147
> l3_interrupt_handler+0x27c/0x39c
> [    3.678052] 44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4_CFG
> (Read): Data Access in User mode during Functional access
> [    3.689330] Modules linked in:
> [    3.692426] CPU: 0 PID: 1 Comm: swapper/0 Not tainted
> 4.18.0-rc1-next-20180619 #1
> [    3.699952] Hardware name: Generic DRA74X (Flattened Device Tree)
> [    3.706099] [<c04156f0>] (unwind_backtrace) from [<c040eec4>]
> (show_stack+0x20/0x24)
> [    3.713897] [<c040eec4>] (show_stack) from [<c116a668>]
> (dump_stack+0xb0/0xdc)
> [    3.721171] [<c116a668>] (dump_stack) from [<c0450a14>] (__warn+0x118/0x130)
> [    3.728270] [<c0450a14>] (__warn) from [<c0450a84>]
> (warn_slowpath_fmt+0x58/0x74)
> [    3.735808] [<c0450a84>] (warn_slowpath_fmt) from [<c08be648>]
> (l3_interrupt_handler+0x27c/0x39c)
> [    3.744742] [<c08be648>] (l3_interrupt_handler) from [<c04cd270>]
> (__handle_irq_event_percpu+0x90/0x45c)
> [    3.754286] [<c04cd270>] (__handle_irq_event_percpu) from
> [<c04cd678>] (handle_irq_event_percpu+0x3c/0x8c)
> [    3.764001] [<c04cd678>] (handle_irq_event_percpu) from
> [<c04cd710>] (handle_irq_event+0x48/0x6c)
> [    3.772933] [<c04cd710>] (handle_irq_event) from [<c04d170c>]
> (handle_fasteoi_irq+0xb0/0x164)
> [    3.781513] [<c04d170c>] (handle_fasteoi_irq) from [<c04cc344>]
> (generic_handle_irq+0x34/0x44)
> [    3.790183] [<c04cc344>] (generic_handle_irq) from [<c04cca48>]
> (__handle_domain_irq+0x6c/0xc4)
> [    3.798941] [<c04cca48>] (__handle_domain_irq) from [<c0402528>]
> (gic_handle_irq+0x68/0xac)
> [    3.807347] [<c0402528>] (gic_handle_irq) from [<c04019bc>]
> (__irq_svc+0x5c/0x7c)
> [    3.814874] Exception stack(0xee179c70 to 0xee179cb8)
> [    3.819963] 9c60:                                     fc140000
> ee3e2f10 ee3a9810 00000000
> [    3.828189] 9c80: 00000000 ee3e2f10 fc140004 fc140000 ee3a9800
> ee3a9810 00000000 ee179cdc
> [    3.836414] 9ca0: ee179ce0 ee179cc0 c0c3b364 c0c3b2ec 60000013 ffffffff
> [    3.843079] [<c04019bc>] (__irq_svc) from [<c0c3b2ec>]
> (ahci_enable_ahci+0x24/0x70)
> [    3.850789] [<c0c3b2ec>] (ahci_enable_ahci) from [<c0c3b364>]
> (ahci_save_initial_config+0x2c/0x388)
> [    3.859894] [<c0c3b364>] (ahci_save_initial_config) from
> [<c0c3cbdc>] (ahci_platform_init_host+0x9c/0x4f4)
> [    3.869609] [<c0c3cbdc>] (ahci_platform_init_host) from
> [<c0c3c33c>] (ahci_probe+0xa0/0xc0)
> [    3.878018] [<c0c3c33c>] (ahci_probe) from [<c0ba40f0>]
> (platform_drv_probe+0x58/0xac)
> [    3.885989] [<c0ba40f0>] (platform_drv_probe) from [<c0ba1aec>]
> (driver_probe_device+0x25c/0x338)
> [    3.894915] [<c0ba1aec>] (driver_probe_device) from [<c0ba1cbc>]
> (__driver_attach+0xf4/0xf8)
> [    3.903411] [<c0ba1cbc>] (__driver_attach) from [<c0b9f9ac>]
> (bus_for_each_dev+0x78/0xc4)
> [    3.911643] [<c0b9f9ac>] (bus_for_each_dev) from [<c0ba13b8>]
> (driver_attach+0x2c/0x30)
> [    3.919696] [<c0ba13b8>] (driver_attach) from [<c0ba0cfc>]
> (bus_add_driver+0x114/0x220)
> [    3.927752] [<c0ba0cfc>] (bus_add_driver) from [<c0ba2e2c>]
> (driver_register+0x88/0x11c)
> [    3.935896] [<c0ba2e2c>] (driver_register) from [<c0ba4044>]
> (__platform_driver_register+0x50/0x58)
> [    3.945003] [<c0ba4044>] (__platform_driver_register) from
> [<c1aa9cf0>] (ahci_driver_init+0x24/0x28)
> [    3.954195] [<c1aa9cf0>] (ahci_driver_init) from [<c0403a8c>]
> (do_one_initcall+0x9c/0x434)
> [    3.962517] [<c0403a8c>] (do_one_initcall) from [<c1a01410>]
> (kernel_init_freeable+0x3b8/0x53c)
> [    3.971276] [<c1a01410>] (kernel_init_freeable) from [<c118551c>]
> (kernel_init+0x18/0x128)
> [    3.979597] [<c118551c>] (kernel_init) from [<c04010ac>]
> (ret_from_fork+0x14/0x28)
> [    3.987210] Exception stack(0xee179fb0 to 0xee179ff8)
> [    3.992298] 9fa0:                                     00000000
> 00000000 00000000 00000000
> [    4.000524] 9fc0: 00000000 00000000 00000000 00000000 00000000
> 00000000 00000000 00000000
> [    4.008750] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
> [    4.015405] irq event stamp: 663130
> [    4.018926] hardirqs last  enabled at (663129): [<c118d9d4>]
> _raw_spin_unlock_irqrestore+0x40/0x6c
> [    4.027939] hardirqs last disabled at (663130): [<c04019ac>]
> __irq_svc+0x4c/0x7c
> [    4.035384] softirqs last  enabled at (661486): [<c0402c98>]
> __do_softirq+0x2a8/0x5e8
> [    4.043262] softirqs last disabled at (661449): [<c04594a4>]
> irq_exit+0x178/0x1a4
> [    4.050826] ---[ end trace 095abac70926448f ]---
> 
> Best regards
> Naresh Kamboju
> --
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