Hi, all!
I use PM branch merged with linux-omap branch. A board is custom, so I
can't bisect this problem
(and I don't know latest working revision). It seems that's because
missing clock domain somewhere,
[16515.695617] Unable to handle kernel NULL pointer dereference at
virtual address 00000020
[16515.703735] pgd = c0004000
[16515.706481] [00000020] *pgd=00000000
[16515.710083] Internal error: Oops: 5 [#1] PREEMPT
[16515.714721] last sysfs file:
[16515.717712] Modules linked in:
[16515.720794] CPU: 0 Not tainted (2.6.32-rc8-07113-g318afc6 #110)
[16515.727111] PC is at pwrdm_for_each_clkdm+0x34/0x88
[16515.731994] LR is at pwrdm_for_each_clkdm+0x24/0x88
[16515.736907] pc : [<c003b5c0>] lr : [<c003b5b0>] psr: 600000d3
[16515.736938] sp : c03f3f68 ip : fa004800 fp : 00000000
[16515.748474] r10: c003e81c r9 : 411fc082 r8 : 00000000
[16515.753723] r7 : a00000d3 r6 : 00000000 r5 : 00000004 r4 : 00000001
[16515.760284] r3 : 00000002 r2 : c03f2000 r1 : 00000001 r0 : 00000000
[16515.766845] Flags: nZCv IRQs off FIQs off Mode SVC_32 ISA ARM
Segment kernel
[16515.774383] Control: 10c5387d Table: 80004019 DAC: 00000017
[16515.780151] Process swapper (pid: 0, stack limit = 0xc03f22e8)
[16515.786010] Stack: (0xc03f3f68 to 0xc03f4000)
[16515.790405] 3f60: c042e4bc 00000003 00000003
c042e4bc 80026398 411fc082
[16515.798645] 3f80: 0000001f c003e76c 00000000 c022f284 00271d5a
00000000 00000005 0ec00c5c
[16515.806854] 3fa0: c03f8640 c03f8710 c042dadc c03f8640 c0474d0c
c022dee8 c03f2000 c042dadc
[16515.815093] 3fc0: c0027e14 c03f5bd0 80026398 c002f49c c0459fa4
c0008914 c0008478 00000000
[16515.823333] 3fe0: 00000000 c0027e18 00000000 10c53c7d c042dbf0
80008034 00000000 00000000
[16515.831573] [<c003b5c0>] (pwrdm_for_each_clkdm+0x34/0x88) from
[<c003e76c>] (omap3_enter_idle+0xc0/0x15c)
[16515.841217] [<c003e76c>] (omap3_enter_idle+0xc0/0x15c) from
[<c022dee8>] (cpuidle_idle_call+0xa4/0x180)
[16515.850677] [<c022dee8>] (cpuidle_idle_call+0xa4/0x180) from
[<c002f49c>] (cpu_idle+0x48/0x98)
[16515.859344] [<c002f49c>] (cpu_idle+0x48/0x98) from [<c0008914>]
(start_kernel+0x250/0x2a8)
[16515.867675] [<c0008914>] (start_kernel+0x250/0x2a8) from
[<80008034>] (0x80008034)
[16515.875274] Code: e3a06000 e1a05008 e1a04006 ea000002 (e595101c)
[16515.881530] ---[ end trace f0a89c74ea639f01 ]---
[16515.886230] Kernel panic - not syncing: Attempted to kill the idle task!
addr2line -e vmlinux c003b5c0
/home/slapin/linux-omap-my-2.6.git/arch/arm/mach-omap2/powerdomain.c:452
It is in function
int pwrdm_for_each_clkdm(), where pwrdm is NULL.
farther investigations found that "core_pwrdm" is defined only for 24xx,
but I use 3525, and it is being searched.
This is where variable allocated. If I add BUG_ON(!core_pd), it crashes here.
arch/arm/mach-omap2/cpuidle34xx.c:348: core_pd = pwrdm_lookup("core_pwrdm");
Otherwise it crashes the above way. Any ideas on how to fix this?
S.
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