Hi Kevin
I'm seeing a oops when I try to write to /sys/power/vdd1_lock.
I am working on 2.6.29 kernel on zoom2.
I have tried to reproduce oops on your latest pm tree but when I build for zoom2 the kernel gets as far as:
Starting kernel ...
And then freezes. Another Tier just clone Tony's tree and reported seeing this with zoom2 also.
Anyway the vdd1_lock Oops is below.
Does this ring any bells ?
I think the oops is caused here:
if (resp->curr_level == target_level)
return 0;
because resp is NULL, presumably because
resp = vdd1_resp;
vdd1_resp is Null also.
vdd1_resp gets setup in init_opp(), which gets called as a func ptr, but I don't know where from.
I added printk's and I'm not seeing init_opp() get called with a struct shared_resource for "vdd1-opp" at boot.
I know this is an old kernel for you.
Still, do you have any pointers ?
Thanks
dom
# echo 1 > /sys/power/vdd1_lock
Unable to handle kernel NULL pointer dereference at virtual address 00000008
<1>pgd = c68d8000
pgd = c68d8000
<1>[00000008] *pgd=8562c031[00000008] *pgd=8562c031, *pte=00000000, *pte=0000000
0. fps=29.762939, *ppte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] PREEMPT
Internal error: Oops: 17 [#1] PREEMPT
Modules linked in:Modules linked in:
CPU: 0 Not tainted (2.6.29-omap1-g70195fc-dirty #15)
CPU: 0 Not tainted (2.6.29-omap1-g70195fc-dirty #15)
PC is at resource_set_opp_level+0x3c/0x16c
PC is at resource_set_opp_level+0x3c/0x16c
LR is at vdd_opp_store+0x148/0x184
LR is at vdd_opp_store+0x148/0x184
pc : [<c004311c>] lr : [<c003efbc>] psr: 60000013
sp : c5653ea8 ip : c5653ee0 fp : c5653edc
pc : [<c004311c>] lr : [<c003efbc>] psr: 60000013
sp : c5653ea8 ip : c5653ee0 fp : c5653edc
r10: c5653f70 r9 : c55d7238 r8 : 00000001
r10: c5653f70 r9 : c55d7238 r8 : 00000001
r7 : 00000000 r6 : c0468c58 r5 : 00000001 r4 : 00000001
r7 : 00000000 r6 : c0468c58 r5 : 00000001 r4 : 00000001
r3 : c0469158 r2 : 00000001 r1 : 00000001 r0 : 00000001
r3 : c0469158 r2 : 00000001 r1 : 00000001 r0 : 00000001
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 10c5307d Table: 868d8019 DAC: 00000015
Control: 10c5307d Table: 868d8019 DAC: 00000015
Process ash (pid: 537, stack limit = 0xc56522e0)
Process ash (pid: 537, stack limit = 0xc56522e0)
Stack: (0xc5653ea8 to 0xc5654000)
Stack: (0xc5653ea8 to 0xc5654000)
3ea0: 3ea0: c5653ed0 c5653ed0 c5653eb8 c5653
eb8 c01a55e4 c01a55e4 c01a5050 c01a5050 00000010 00000010 00000001 00000001
3ec0: 3ec0: 00000001 00000001 c0468c58 c0468c58 00000002 00000002 c04500c4 c0450
0c4 c5653f04 c5653f04 c5653ee0 c5653ee0 c003efbc c003efbc c00430ec c00430ec
3ee0: 3ee0: 40001000 40001000 00017220 00017220 00000002 00000002 c55eaae8 c55ea
ae8 c55d7220 c55d7220 c681dd60 c681dd60 c5653f14 c5653f14 c5653f08 c5653f08
3f00: 3f00: c01a060c c01a060c c003ee80 c003ee80 c5653f44 c5653f44 c5653f18 c5653
f18 c01035d4 c01035d4 c01a05f8 c01a05f8 c5653f70 c5653f70 c68332c0 c68332c0
3f20: 3f20: 40001000 40001000 c5653f70 c5653f70 00000002 00000002 40001000 40001
000 c5652000 c5652000 00000000 00000000 c5653f6c c5653f6c c5653f48 c5653f48
3f40: 3f40: c00b7188 c00b7188 c01034d0 c01034d0 c68332c0 c68332c0 00000000 00000
000 00000000 00000000 00000000 00000000 c68332c0 c68332c0 00000002 00000002
3f60: 3f60: c5653fa4 c5653fa4 c5653f70 c5653f70 c00b72dc c00b72dc c00b70dc c00b7
0dc 00000000 00000000 00000000 00000000 c5653fa4 c5653fa4 00000000 00000000
3f80: 3f80: c00c3c2c c00c3c2c 00000002 00000002 40001000 40001000 001d41f8 001d4
1f8 00000004 00000004 c0031028 c0031028 00000000 00000000 c5653fa8 c5653fa8
3fa0: 3fa0: c0030e80 c0030e80 c00b72a4 c00b72a4 00000002 00000002 40001000 40001
000 00000001 00000001 40001000 40001000 00000002 00000002 00000000 00000000
3fc0: 3fc0: 00000002 00000002 40001000 40001000 001d41f8 001d41f8 00000004 00000
004 00000002 00000002 001db23c 001db23c 00000000 00000000 00000000 00000000
3fe0: 3fe0: 40001000 40001000 bef47600 bef47600 000f6f6c 000f6f6c 00008e2c 00008
e2c 60000010 60000010 00000001 00000001 ff0000ff ff0000ff ff0004ff ff0004ff
Backtrace: Backtrace:
[<c00430e0>] [<c00430e0>] (resource_set_opp_level+0x0/0x16c) (resource_set_opp_l
evel+0x0/0x16c) from [<c003efbc>] from [<c003efbc>] (vdd_opp_store+0x148/0x184)
(vdd_opp_store+0x148/0x184)
r8:c04500c4 r8:c04500c4 r7:00000002 r7:00000002 r6:c0468c58 r6:c0468c58 r5:0000
0001 r5:00000001 r4:00000001 r4:00000001
[<c003ee74>] [<c003ee74>] (vdd_opp_store+0x0/0x184) (vdd_opp_store+0x0/0x184) fr
om [<c01a060c>] from [<c01a060c>] (kobj_attr_store+0x20/0x24)
(kobj_attr_store+0x20/0x24)
r7:c681dd60 r7:c681dd60 r6:c55d7220 r6:c55d7220 r5:c55eaae8 r5:c55eaae8 r4:0000
0002 r4:00000002
[<c01a05ec>] [<c01a05ec>] (kobj_attr_store+0x0/0x24) (kobj_attr_store+0x0/0x24)
from [<c01035d4>] from [<c01035d4>] (sysfs_write_file+0x110/0x144)
(sysfs_write_file+0x110/0x144)
[<c01034c4>] [<c01034c4>] (sysfs_write_file+0x0/0x144) (sysfs_write_file+0x0/0x1
44) from [<c00b7188>] from [<c00b7188>] (vfs_write+0xb8/0x148)
(vfs_write+0xb8/0x148)
[<c00b70d0>] [<c00b70d0>] (vfs_write+0x0/0x148) (vfs_write+0x0/0x148) from [<c00
b72dc>] from [<c00b72dc>] (sys_write+0x44/0x70)
(sys_write+0x44/0x70)
r7:00000002 r7:00000002 r6:c68332c0 r6:c68332c0 r5:00000000 r5:00000000 r4:0000
0000 r4:00000000
[<c00b7298>] [<c00b7298>] (sys_write+0x0/0x70) (sys_write+0x0/0x70) from [<c0030
e80>] from [<c0030e80>] (ret_fast_syscall+0x0/0x2c)
(ret_fast_syscall+0x0/0x2c)
r8:c0031028 r8:c0031028 r7:00000004 r7:00000004 r6:001d41f8 r6:001d41f8 r5:4000
1000 r5:40001000 r4:00000002 r4:00000002
Code: Code: e3500002 e3500002 1a000045 1a000045 e59f311c e59f311c e5937224 e5937
224 (e5973008) (e5973008)
<4>---[ end trace c4cd1e6865843b71 ]---
---[ end trace c4cd1e6865843b71 ]---
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