Hello,

my EVK is AT91SAM9M10-EK and I'm using the Android4SAM project.

I'm trying to develop the RIL library, but I'm facing a strange problem. When closing a connected call the evk freezes and I need to reboot. Enabling the kernel debugging features I've seen that there is the following soft lockup:

BUG: soft lockup - CPU#0 stuck for 61s! [Playback Thread:854]
Modules linked in:

Pid: 854, comm: Playback Thread
CPU: 0 Not tainted (2.6.30 #1)
PC is at vprintk+0x308/0x35c
LR is at vprintk+0x300/0x35c
pc : [<c0047a3c>] lr : [<c0047a34>] psr: 60000013
sp : c7c9be10 ip : 00004000 fp : 00000048
r10: 00000000 r9 : 89705f41 r8 : 36b4a597
r7 : c03bbfcc r6 : c042669c r5 : 00000000 r4 : 00000001
r3 : 80000013 r2 : c0401550 r1 : 00010004 r0 : 00000001
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 0005317f Table: 773f8000 DAC: 00000015

PC: 0xc00479bc:
79bc 159f30a8 159340a0 1a000004 ea00000a e1d432b8 e3130010 1a000007 e5944034
79dc e3540000 1afffff9 e59f3080 e59f009c e5834010 eb0060cd ea000000 e3a04001
79fc e59f3064 e3e02000 e583204c e3a00001 ebffe2b4 e3cd3d7f e3c3303f e5933000
7a1c e3130002 0a000000 eb0abaed e3540000 0a000000 ebfffe16 e59d300c e121f003
7a3c e3a00001 ebffe2a7 e3cd3d7f e3c3303f e5933000 e3130002 0a000000 eb0abae0
7a5c e1a0000b e28dd054 e8bd8ff0 c0401544 c04265a0 c0402668 c02f98d4 c0426654
7a7c 36b4a597 89705f41 3b9aca00 c037e930 c0401570 e92d000f e52de004 e24dd00c
7a9c e28d3014 e1a01003 e59d0010 e58d3004 ebffff20 e28dd00c e49de004 e28dd010

LR: 0xc00479b4:
79b4 e59d2004 e3520000 159f30a8 159340a0 1a000004 ea00000a e1d432b8 e3130010
79d4 1a000007 e5944034 e3540000 1afffff9 e59f3080 e59f009c e5834010 eb0060cd
79f4 ea000000 e3a04001 e59f3064 e3e02000 e583204c e3a00001 ebffe2b4 e3cd3d7f
7a14 e3c3303f e5933000 e3130002 0a000000 eb0abaed e3540000 0a000000 ebfffe16
7a34 e59d300c e121f003 e3a00001 ebffe2a7 e3cd3d7f e3c3303f e5933000 e3130002
7a54 0a000000 eb0abae0 e1a0000b e28dd054 e8bd8ff0 c0401544 c04265a0 c0402668
7a74 c02f98d4 c0426654 36b4a597 89705f41 3b9aca00 c037e930 c0401570 e92d000f
7a94 e52de004 e24dd00c e28d3014 e1a01003 e59d0010 e58d3004 ebffff20 e28dd00c

SP: 0xc7c9bd90:
bd90 c03febf8 c04036e8 00000001 00010004 00010003 c0072ad0 00000001 c7c9bf20
bdb0 00000001 c002d050 00000000 ffffffff fefff000 c002d9c8 00000001 00010004
bdd0 c0401550 80000013 00000001 00000000 c042669c c03bbfcc 36b4a597 89705f41
bdf0 00000000 00000048 00004000 c7c9be10 c0047a34 c0047a3c 60000013 ffffffff
be10 c784cac0 00000000 00000007 80000013 c03bbfb0 c03bbfbc c0399c30 c786f240
be30 00000000 c72eff20 00000018 00000001 00000000 00000000 c7c9a000 0000000a
be50 00000000 c72eff20 c0403e18 00000018 00000104 c03bbfb0 c0399c30 c03bbfa0
be70 c72fc9f0 00000033 0000000b 00000003 00000020 c0047ab0 c042ac20 c7c9be9c

R2: 0xc04014d0:
14d0 00000003 00000004 00000005 00000006 00000007 00000008 00000009 0000000a
14f0 0000000b 0000000c 0000000d 0000000e 0000000f 00000010 00000011 00000012
1510 00000013 00000014 00000015 00000016 00000017 00000018 00000019 0000001a
1530 0000001b 0000001c 0000001d 0000001e 0000001f 00004000 c0426a58 00000001
1550 c0401550 c0401550 00000000 00001388 0000000a 00000000 00000000 00000000
1570 00000001 c0401574 c0401574 00000007 00000004 00000001 00000007 00000004
1590 ffffffff 00000000 00000000 00000000 00000000 c037ec18 c037ec1c c037ec24
15b0 c037ec2c c037ec34 c037ec3c c037ec44 c037ec4c c037ec54 00000000 c04015c8

R6: 0xc042661c:
661c 00000000 00000000 00000000 00000000 00000000 00000000 00000001 00000000
663c 00000000 c0415968 00000000 00000000 00000000 00000000 30303020 32303330
665c 36320030 3a633136 5420000a 656c6261 3737203a 30386633 20203030 3a434144
667c 30303020 31303030 20000a35 67655320 746e656d 65737520 31000a72 69202030
669c 203a2070 30303030 30303034 70662020 30203a20 30303030 0a383430 73752000
66bc 74612d62 2d6c656d 69636865 332e322d 706e692f 0a307475 74696e00 686f6e20
66dc 666f3d7a 6f722066 6564746f 3d79616c 34000a31 45432030 32205453 0a313130
66fc 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

R7: 0xc03bbf4c:
bf4c 206c656d 37394341 6e6f6320 6c6f7274 2072656c 30207461 2c702578 71726920
bf6c 25203d20 00000a64 253e373c 73252073 6f63203a 20646c75 20746f6e 20746573
bf8c 65746172 20642520 000a7a48 52564f20 00004e55 52585220 00005944 524e5520
bfac 00004e55 45585420 5954504d 00000000 52585420 00005944 4e4f4e20 00000045
bfcc 253e373c 73252073 6863203a 656e6e61 2041206c 6e657665 25732574 25732573
bfec 25732573 00000a73 253e373c 73252073 6f63203a 20636564 6e616863 206c656e
c00c 6e657665 25732574 25732573 0a732573 00000000 253e333c 73252073 7073203a
c02c 6f697275 69207375 7265746e 74707572 20727320 30257830 63207838 20727361

Anyone has seen a similar behaviour?

Thanks in advance,
Daniele