Hi All,
I'm checking PM suspend resume functionality using TI81xx custom board.
Using UART method, added 'no_console_suspend' bootargs, and it goes to suspend state $echo "mem" > /sys/power/state
But When i press any key, it crashes after early resume.
Check the logs here::
root@dm814x-evm:~# echo "mem" > /sys/power/state
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.01 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.
PM: suspend of devices complete after 1.151 msecs
PM: suspend devices took 0.000 seconds
PM: late suspend of devices complete after 0.807 msecs >>>pressing key after this<<<<
PM: early resume of devices complete after 0.837 msecs
kernel BUG at kernel/workqueue.c:989!
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c36e0000
[00000000] *pgd=83686031, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#1]
last sysfs file: /sys/devices/virtual/vc/vcsa63/uevent
Modules linked in: syslink
CPU: 0 Not tainted (2.6.37_DM388_IPNC_3.80.00 #8)
PC is at __bug+0x24/0x30
LR is at release_console_sem+0x180/0x194
pc : [<c004cd7c>] lr : [<c0072410>] psr: 60000093
sp : c3703d40 ip : c3703c80 fp : c3703d4c
r10: 00000000 r9 : c04d16ec r8 : c46b3c08
r7 : 60000013 r6 : c04d16e8 r5 : c04b507c r4 : c4403c00
r3 : 00000000 r2 : c04b3bf4 r1 : 00008e5f r0 : 0000002c
Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user
Control: 10c5387d Table: 836e0019 DAC: 00000015
Process sh (pid: 393, stack limit = 0xc37022e8)
Stack: (0xc3703d40 to 0xc3704000)
3d40: c3703d84 c3703d50 c0082d6c c004cd64 509c8af8 1b9f7aa2 80000013 60000013
3d60: 00000001 00000000 c04d16e8 c46b3c08 c0391b0c 00000000 c3703d9c c3703d88
3d80: c0082e1c c0082bd4 00000000 c04d1690 c3703dac c3703da0 c0082e70 c0082df8
3da0: c3703dbc c3703db0 c0082e90 c0082e5c c3703de4 c3703dc0 c02b1b3c c0082e80
3dc0: c02b1ae4 00000000 00000000 c021729c c46b3c08 c443f480 c3703df4 c3703de8
3de0: c02172e4 c02b1af0 c3703e2c c3703df8 c021a3cc c02172a8 c021a220 c0212844
3e00: 00000000 00000000 c0452189 c46b3c08 00000010 c46b3c3c c04c6f88 c46b3c60
3e20: c3703e4c c3703e30 c021a7cc c021a35c c46b3c08 00000010 c04c6f94 c04c6f88
3e40: c3703e94 c3703e50 c021aa78 c021a768 00000000 00000000 0482a7ff 0000004a
3e60: 0482a7ff 0000004a c04c6c28 c46b3a58 00000000 00000000 00000003 00000004
3e80: c037d8f8 c04352a2 c3703eb4 c3703e98 c009df78 c021a95c 60000013 c04352a2
3ea0: 00000003 00000000 c3703ed4 c3703eb8 c009e09c c009ddcc 0000006d c3e8b000
3ec0: 00000003 00000003 c3703efc c3703ed8 c009d698 c009dfe4 c441ac30 c3703f70
3ee0: 00000004 c3765cc0 c4420d40 c3765cd8 c3703f0c c3703f00 c01d29f4 c009d5f8
3f00: c3703f3c c3703f10 c010f824 c01d29e4 c3703f70 00000004 c36d3680 400cf000
3f20: c3703f70 00000004 c3702000 00000000 c3703f6c c3703f40 c00ca4f4 c010f720
3f40: c3703fa4 c3703f50 c0074e70 c36d3680 400cf000 00000000 00000000 00000004
3f60: c3703fa4 c3703f70 c00ca778 c00ca444 00000000 00000000 c00d6e78 00000000
3f80: 00000000 00000004 400cf000 402f95d0 00000004 c0049568 00000000 c3703fa8
3fa0: c00493c0 c00ca740 00000004 400cf000 00000001 400cf000 00000004 00000000
3fc0: 00000004 400cf000 402f95d0 00000004 00000004 400b24c0 000c2d48 000a3294
3fe0: 00000000 be9fa5d0 402363b8 4028915c 60000010 00000001 78030de9 4c00fd29
Backtrace:
[<c004cd58>] (__bug+0x0/0x30) from [<c0082d6c>] (__queue_work+0x1a4/0x1f8)
[<c0082bc8>] (__queue_work+0x0/0x1f8) from [<c0082e1c>] (queue_work_on+0x30/0x40)
[<c0082dec>] (queue_work_on+0x0/0x40) from [<c0082e70>] (queue_work+0x20/0x24)
r5:c04d1690 r4:00000000
[<c0082e50>] (queue_work+0x0/0x24) from [<c0082e90>] (schedule_work+0x1c/0x24)
[<c0082e74>] (schedule_work+0x0/0x24) from [<c02b1b3c>] (soc_resume+0x58/0x8c)
[<c02b1ae4>] (soc_resume+0x0/0x8c) from [<c02172e4>] (platform_pm_resume+0x48/0x5c)
r8:c443f480 r7:c46b3c08 r6:c021729c r5:00000000 r4:00000000
r3:c02b1ae4
[<c021729c>] (platform_pm_resume+0x0/0x5c) from [<c021a3cc>] (pm_op+0x7c/0xb4)
[<c021a350>] (pm_op+0x0/0xb4) from [<c021a7cc>] (device_resume+0x70/0x18c)
r8:c46b3c60 r7:c04c6f88 r6:c46b3c3c r5:00000010 r4:c46b3c08
[<c021a75c>] (device_resume+0x0/0x18c) from [<c021aa78>] (dpm_resume_end+0x128/0x3f4)
r7:c04c6f88 r6:c04c6f94 r5:00000010 r4:c46b3c08
[<c021a950>] (dpm_resume_end+0x0/0x3f4) from [<c009df78>] (suspend_devices_and_enter+0x1b8/0x218)
[<c009ddc0>] (suspend_devices_and_enter+0x0/0x218) from [<c009e09c>] (enter_state+0xc4/0x128)
r6:00000000 r5:00000003 r4:c04352a2 r3:60000013
[<c009dfd8>] (enter_state+0x0/0x128) from [<c009d698>] (state_store+0xac/0xc0)
r6:00000003 r5:00000003 r4:c3e8b000 r3:0000006d
[<c009d5ec>] (state_store+0x0/0xc0) from [<c01d29f4>] (kobj_attr_store+0x1c/0x28)
[<c01d29d8>] (kobj_attr_store+0x0/0x28) from [<c010f824>] (sysfs_write_file+0x110/0x144)
[<c010f714>] (sysfs_write_file+0x0/0x144) from [<c00ca4f4>] (vfs_write+0xbc/0x148)
[<c00ca438>] (vfs_write+0x0/0x148) from [<c00ca778>] (sys_write+0x44/0x70)
r8:00000004 r7:00000000 r6:00000000 r5:400cf000 r4:c36d3680
[<c00ca734>] (sys_write+0x0/0x70) from [<c00493c0>] (ret_fast_syscall+0x0/0x30)
r8:c0049568 r7:00000004 r6:402f95d0 r5:400cf000 r4:00000004
Code: e59f0010 e1a01003 eb0c9694 e3a03000 (e5833000)
---[ end trace 2e690282fcbc5097 ]---
Help would be much appreciated.
Regards
Kaushal
