Bug:scheduling while atomic..

sandeep kumar coolsandyforyou at gmail.com
Mon Dec 5 04:12:20 EST 2011 

Hi all,
here is the dump i got in dmesg...

<3>[ 4940.803872] BUG: scheduling while atomic: rild/144/0x00000908
<4>[ 4940.803895] Modules linked in: mwlan_aarp(P) bthid
<4>[ 4940.803918]
<4>[ 4940.803927] Pid: 144, comm:                 rild
<4>[ 4940.803943] CPU: 0    Tainted: P        W    (2.6.38.6 #1)
<4>[ 4940.803973] PC is at dpram_write+0x3e4/0x848
<4>[ 4940.803988] LR is at 0xad
<4>[ 4940.804002] pc : [<c03b8b80>]    lr : [<000000ad>]    psr: 20000013
<4>[ 4940.804010] sp : e8379e50  ip : c09a4578  fp : e8379e8c
<4>[ 4940.804022] r10: e8308450  r9 : e89d5400  r8 : e849ba40
<4>[ 4940.804037] r7 : e89d5400  r6 : 0000000d  r5 : 0000000d  r4 : c078f324
<4>[ 4940.804050] r3 : fa14c4b0  r2 : 000001ad  r1 : 00000008  r0 : 0000007e
<4>[ 4940.804067] Flags: nzCv  IRQs on  FIQs on  Mode SVC_ate -2017760,
reprogram it
<3>[ 4940.915690] msm_timer_enter_idlable: 2853c059  DAC: 00000015
<4>[ 4940.804095]
<4>[ 4940.804098] PC: 0xc03b8b00:
<4>[ 4940.804, reprogram it
<3>[ 4940.915719]fc07c e142c0b1 e2400001 e3110001 e1a000c0 02632000
<4>[ 4940.804148] 8b20  0a00000b ea000003 e551c001 e5512002 e182240c
e0c320b2 e3500000 e2811002
<4>[ 4940.804188] 8b40  e2400001 1afffff7 ea0000b6 e19cc0b1 e0c3c0b2
e3500000 e083c002 e2400001
<4>[ 4940.804-2019424, reprogram it
<3>[ 494025005 e5933000 e1560005 b1a05006 a1a05005 e3550000
<4>[ 4940.804270] 8b80  da00004d e0822001 e1aer_idle: timer late -2019968,
re 0a00000e e3170001
<4>[ 4940.804310] 8ba0  e2450001 015320b1 01d710b0 115310b1 115720b1
06ef2072 01822401 16ef1071
<4>[ 4940.804350] 8bc0  13c220ff 11822001 06ff2072 e2871001 e14320b1
e2833001 e3100001 0a000022
<4>[ 4940.804390] 8be0  e2432001 e241c001 e0822000 e08cc000 e3120001
e20ce001 1a000006 e35e0000
<4>[ 4940.804432]
<4>[ 4940.804435] SP: 0xe8379dd0:
<4>[ 4940.804443] 9dd0  e8379dec e8379de0 c00b1644 c00b14c4 e8379e04
e8379df0 c0033084 c00b1600
<4>[ 4940.804485] 9df0  ffffffff fa000000 e8379e8c e8379e08 c003918c
c003300c 0000007e 00000008
<4>[ 4940.804523] 9e10  000001ad fa14c4b0 c078f324 0000000d 0000000d
e89d5400 e849ba40 e89d5400
<4>[ 4940.804563] 9e30  e8308450 e8379e8c c09a4578 e8379e50 000000ad
c03b8b80 20000013 ffffffff
<4>[ 4940.804603] 9e50  60000013 e8379ec0 e8379e7c 01ad01ad c04dd664
e8308000 0000000d e89d5400
<4>[ 4940.804643] 9e70  e8378000 e849ba40 e89d5400 e8308it
<3>[ 4940.915979] msm_timer_e03b87a8
<4>[ 4940.804683] 9e90  e8379ef4 e8379ea0 c025f3a0 c03b8ff0 c02623e0
c04dd650 e83080d0 e8308158
<4>[ 4940.804723] 9eb0  e8379ef4 00000000 e83746c0 c00a8imer late -2024128,
reprogram it8308000
<4>[ 4940.804765]
<4>[ 4940.804768] IP: 0xc09a44f8:
<4>[ 4940.804777] 44f8  00000000 00000000 c074b1c0 e8b49200 e8b3266024672,
reprogram it
<3>[ 4940.9nter_idle: timer late -2513888, 000000 00000000 00000000
e92b4e60 00000001 e8b4d000 00000001
<4>[ 4940.804855] 4538  00000001 00000001 00000000 00000000 00000000
00000000 00000000 e926de00
<4>[ 4940.804893] 4558  e8b32460 00094] msm_timer_enter_idle: timer8
00000000 e8b7db60 e8b854a8
<4>[ 4940.804933] 4578  fa14c4b0 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.804972] 4598  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.805010] 45b8  00000000 00000000 00000000 00000000 00000005808,
reprogram it
<3>[ 4940.941[ 4940.805048] 45d8  00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000
<4>[ 4940.805088]
<4>[ 4940.805092e -2027424, reprogram it
<3>[ 4900] 9e0c  00000008 000001ad fa14c4b0 c078f324 0000000d 0000000d
e89d5400 e849ba40
<4>[ 4940.805138] 9e2c  e89d5400 e8308450 e8379e8c c09a4578 e8379e50
000000ad c03b8b80 20000013
<4>[ 4940.805178] 9e4c  ffffffff 60000013 e8379ec0 e8379e7c 01ad01ad
c04dd664 e8308000 0000000d
<4>[ 4940.805218] 9e6c  e89d5400 e8378000 e849ba40 e89d5400 e8308450
e8379e9c program it
<3>[ 4940.916265] msm58] 9e8c  c03b87a8 e8379ef4 e8379ea0 c025f3a0 c03b8ff0
c02623e0 c04dd650 e83080d0
<4>[ 4940.805298] 9eac  e8308158 e8379ef4 00000000 e83746c0 c00a89ac
e8377bec e8308168 e849ba40
<4>[ 4940.805338] 9ecc  e8308000 0000000d e849ba40 e8378000 0000000d
0001e7d0 0000000d e8379f3c
<4>[ 4940.805378] 9eec  e8379ef8 c025c280 c025f0d8 00000018 c025f0cc
e836b520 [ 4940.916337] msm_timer_enter_i20]
<4>[ 4940.805423] R3: 0xfa14c430:
<4>[ 4940.805432] c430  0er_enter_idle: timer late -2030700 00000000
00000000 00000000 00000000
<4>[ 4940.805472] c450  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.805512] c470  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.805550] c490  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.805590] c4b0  000100aa 01ad01ad 00127f7e 3a000fit
<3>[ 4940.916439] msm_timer_e0b7f7e
<4>[ 4940.805630] c4d0  3b000816 04031300 0f7f7e00 000c170272, reprogram it
<3>[ 4940.96718000b
<4>[ 4940.805672] c4f0  13003d00 7e000401 1900127f 003e000f 06050113
38013100 7e303031 1a
<3>[ 4940.916480] msm_timer_ent03f0008 00040313 000f7f7e 40000c1b 05031300
00040003 0b7f7e00 00081c00
<4>[ 4940.805755]
<4>[ 4940.805758] R4: 0xc078f2a4:
<4>[ 4940.805767] f2a4  00000000 00000000 00000000 00000000 00000000
00000000 e8b8cf60 c0563518
<4>[_idle: timer late -2034048, repr00000 c078f2cc c078f2cc c078f300
c078f310 00000000 c069ea3b
<4>[ 4940.805845] f2e4  000001b4 c03b3004 00000000 c069ea47 000001b4
c03b3054 00000000 c0643eea
<4>[ 4940.805885] f304  000001b4 c03b2fd0 c03b3a8c c069ea50 000001b442046]
msm_timer_enter_idle: tim 4940.805925] f324  00002000 00002002 00002004
000003fc 00000004 00000006 00000008 000003fc
<4>[ 4940.805963] f344  00080020 00000002 e8308000 00000001 00000001
dead4ead ffffffff ffffffff
<4>[ 4940.806003] f364  00000001 c078f368 c078f368 00002400 00002402
00002404 00005bf8 00000404
<4>[ 4940.806043] f384  00000406 00000408 00001bf8 00040010 00000001
00000000 00000000 00000001
<4>[ 4940.806083]
<4>[ 4940.806087] R7: 0xe89d5380:
<4>[ 4940.806095] 5380  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806132] 53a0  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806170] 53c0  00000000 00000000 00000000 00000000 00000000
00000000 0program it
<3>[ 4940.916725] msm8] 53e0  00000000 00000000 00000037920, reprogram it
<3>[ 4940.90000000 00000000
<4>[ 4940.806247] 5400  30000b7f 00550008 00040113 0000047e 7e30307e
0100007e 007e0100 00000000
<4>[ 4940.806287] 5420  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806325] 5440  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806363] 5460  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806402]
<4>[ 4940.806405] R8: 0xe849b9c0:
<4>[ 4940.806413] b9c0  ffffffff 00000002 00000002 00000003 00000000
00000000 deaf1eed fff9056, reprogram it
<3>[ 4940.942ffffff 00000000 00000000 00000000 00000000 00000000 e8dde5c0
00000000
<4>[ 4940.806492] ba00  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806530] ba20  00000000 00000000 e8e667c0 e849ba2c e849ba2c
e8e668d4 00000000 00000000
<4>[ 4940.806568] ba40  e849bc20 e849bcc0 e9210300 e8de5478 c0545ec8
00000001 dead4ead ffffffff
<4>[ 4940.806608] ba60  ffffffff 00000004 00020802 00000003 00000000
00000000 deaf1eed ffffffff
<4>[ 4940.806648] ba80  ffffffff 00000000 00000000 00000000 00000000
00000000 e8dde5c0 000 timer late -2531264, reprogram 000000 00000000
00000000 00000000 00000000 00000000 ffffffff ffffffff
<4>[ 4940.806727]
<4>[ 4940.806730] R9: 0xe89d5380:
<4>[ 4940.806738] 5380  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806775] 53a0  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806813] 53c0  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806852] 53e0  00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
<4>[ 4940.806890] 5400  30000b7f 00550008 00040113 0000047e 7e30307e e:
timer late -2044576, reprogra4940.806930] 5420  00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
<4>[ 4940.806967] 5440  00000000 00000000 00000000 00000000 00000000
er_enter_idle: timer late -253434940.807005] 5460  00000000 00000000
00000000 00000000 00000000 nter_idle: timer late -2045664, 4940.807045]
<4>[ 4940.807048] e: timer late -2534848, reprogra-2045952, reprogram it
<3>[ 4940000 00000000 00000000 00000000 e8383000 00000000
<4>[ 4940.80709r late -2146945184, reprogram it000 00000000 00000001
00000001 dead4ead ffffffff
<4>[ 4940.807133] 8410  ffffffff e8308414 e8308414 e8376000 00000000
e8308400 00000000 00000001
<4>[ 4940.807173] 8430  dead4ead ffffffff fffff3>[ 4940.917215]
msm_timer_enter0000000 e8308428
<4>[ 4940.807213] 8450  00000001 00000001 dead4ead ffffffff ffffffff
e8308464 e7616, reprogram it
<3>[ 4940.917er_idle: timer late -2536800, ree: timer late -9850304,
reprografffffff e830848c
<4>[ 4940.807292] 8490  e830848c e8522000 00000000 e8308478 e89d5400
00000400 00000001 dead4ead
<4>[ 4940.807332] 84b0  ffffffff ffffffff 00000200 e83084bc e83084bc
c025bdcc 0ogram it
<3>[ 4940.942764] msm_t5] [<c003b0e8>] (show_regs+0x0/0
<3>[ 4940.968228] msm_timer_enter_idle: timer late -3026816, re10]
 r5:c075dac0 r4:e8379e08
<4>, reprogram it
<3>[ 4940.917330]chedule_bug+0x0/0x60) from [<c04daa48>]
(schedule+0x88/0x5c8)
<4>[ 4940.807453]  r5:c075dac0 r4:e83746c0
<4>[ 4940.807478] [<c04da9c0>] (schedule+0x0/0x5c8) from [<c04db1e4>]
(schedule_timeout+0x24/0x1e4)
<4>[ 4940.807502] [<c04db1c0>] (schedule_timeout+0x0/0x1e4) from
[<c04dc9a8>] (__down+0x74/0xa8)
<4>[ 4940.807517]  r7:00000002 r6:e83746c0 r5:7fffffff r4:c078f428
<4>[ 4940.807550] [<c04dc934>] (__down+0x0/0xa8) from [<c00ca394>]
(down+0x34/0x44)
<4>[ 4940.807563]  r7:e8b9b6ec r6:00000033 r5:60000013 r4:c078f428
<4>[ 4940.807597] [<c00ca360>] (down+0x0/0x44) from [<c03>[ 4940.917447]
msm_timer_enter)
<4>[ 4940.807610]  r5:e8b9b6ec r4:c078f370
<4>[ 4940.807635] [<c03b879c>] (dpram_write+0x0/0x848) from [<c03b90b8>]
(vs_write+0xb4/0xf4)
<4>[ 4940.807658] [<c03b9004>] (vs_write+0x0/0xf4) from [<c02cea5c>]
(ppp_async_push+0x10c/0x570)
<4>[ 4940.807680] [<c02ce950>] (ppp_async_push+0x0/0x570) from [<c02cef10>]
(ppp_async_send+0x50/0x58)
<4>[ 4940.809] msm_timer_enter_idle: timer late -2053152, reprogram it
<3>[ ppp_push+0x74/0x5c4)
<4>[ 4940.807722]  r5:caf9c0d4 r4:c80abc00
<4>[ 4940.807748] [<c02ca9dc>] (ppp_push+0x0/0x5c4) from [<c02cba3c>]
(ppp_xmit_process+0x430/0x4ec)
<4>[ 4940.807773] [<c02cb60c>] (ppp_xmit_process+0x0/0x4ec) from
[<c02cbc94>] (ppp_start_xm3>[ 4940.968501] msm_timer_enter] [<c02cbaf8>]
(ppp_start_xmit+0x0/0x1c8) from [<c03cc490>] (devimer_enter_idle: timer
late -303>[ 4940.807813]  r7:e0bcba5c r6:c80ab800 r5:00002000
r4:e839de20.917619] msm_timer_enter_idle: t(dev_hard_start_xmit+0x0/0x554)
from [<c03dfe7c>] (sch_direct_xmit+0x68/0x1b4)
<4>[ 4940.807877] [<c03dfe14>] (sch_direct_xmit+0x0/0x1b4) from
[<c03cc7d8>] (dev055648, reprogram it
<3>[ 4940.940.807902] [<c03cc5bc>] (dev_queue_xmit+0x0/0x42c) from
[<c040dd3>[ 4940.917677] msm_timer_enter1c)
<4>[ 4940.807925] [<c040da48>] (ip_finish_output+0x0/0x31c) from
[<c040de50>] (ip_output+0xec/0x100)
<4>[ 4940.807948] [<c040dd64>] (ip_output+0x0/0x100) from [<c040cd14>]
(ip_local_out+0x30/0x34)
<4>[ 4940.807962]  r9:e8379b6c r8:00000040 r6:e853c660 r5:e92efc20
r4:e839de20
<4>[ 4940.808000] [<c040cce4>] (ip_local_out+0x0/0x34) from [<c040d028>]
(ip_push_pending_frames+0x310/0x3b0)
<4>[ 4940.808015]  r5:e92efc20 r4:e839de20
<4>[ 4940.808040] [<c040cd18>] (ip_push_pending_frames+0x0/0x3b0) from
[<c040d2ac>] (ip_send_reply+0x1e4/0x20c)
<4>[ 4940.808065] [<c040d0c8>] (ip_send_reply+0x0/0x20c) from [e -2058400,
reprogram it
<3>[ 49x140/0x16c)
<4>[ 4940.808088] [<c0424890>] (tcp_v4_send_reset+0x0/0x16c) from
[<c0426924>] (tcp_v4_rcv+0x7e0/0x84c)
<4>[ 4940.808103]  r6:c800b038 r5:00000000 r4:e839dca0
<4>[ 4940.808133] [<c0426144>] (tcp_v4_rcv+0x0/0x84c) from [<c040899c>]
(ip_local_delimer late -2059488, reprogram it40.808157] [<c040887c>]
(ip_local_deliver_finish+0x0/0x228) from [<c0408b30>]
(ip_local_deliver+0x8c/0x9c)
<4>[ 4940.808172]  r9:00000000 r8:00a6518a r7:00000000 r6:00a65748
r5:c800b024
<4>[ 4940.808198] r4:e839dca0
<4>[ 4940.808217] [<c0408aa4>] (ip_local_deliver+0x0/0x9c) from
[<c0408538>] (ip_rcv_finish+0x324/0x344)
<4>[ 4940.808232]  r4:e839dca0
<4>[ 4940.808250] [<c0408214>] (ip_rcv_finish+0x0/0x344) from [<c0408838>]
(ip_rcv+0x2e0/0x324)
<4>[ 4940.808263]  r9:00000000 r8:00a6518a r7:00000000 r6:00a65743425]
msm_timer_enter_idle: tim r4:e839dca0
<4>[ 4940.808310] [<c0408558>] (ip_rcv+0x0/0x324) from [<c03ca974>]
(__netif_receive_skb+0x34c/0x3a4)
<4>[ 4940.808325]  r9:00000008 r8:e8379cfc r7:e839dd48 r6:c0740ff8
r5:c80ab800
<4>[ 4940.808352] r4:e839dca0
<4>[ 4940.808370] [<c03ca628>] (__netif_receive_skb+0x0/0x3a4) from
[<c03caa54>] (process_backlog+0x88/0x138)
<4>[ 4940.808393] [<c03ca9cc>] (process_backlog+0x0/0x138) from
[<c03cadcc>] (net_rx_action+0x70/0x160)
<4>[ 4940.808417] [<c03cad5c>] (net_rx_action+0x0/0x160) from [<c00b1540>]
(__do_softirq+0x88/0x13c)
<4>[ 4940.808440] [<c00b14b8>] (__do_softirq+0x0/0x13c) from [<c00b1644>]
(irq_exit+0x50/0xa4)
<4>[ 4940.808465] [<c00b15f4>] (irq_exit+0x0/0xa4) from [<c0033084>]
(program it
<3>[ 4940.918108] msm_timer_enter_idle: timer late -2+0x0/0xa8) from
[<c003918c>] (__irq_svc+0x4c/0x90)
<4>[ 4940.808503] Exception stack(0xe8379e08 to 0xe8379e50)
<4>[ 4940.808522] 9e00:                   0000007e 00000008 000001ad
fa14c4b0 c078f324 0000000d
<4>[ 4940.808543] 9e20: 0000000d e89d5400 e849ba40 e89d5400 e8308450
e8379e8c c09a4578 e8379e50
<4>[ 4940.808560]_timer_enter_idle: timer late -23 ffffffff
<4>[ 4940.808572]  r5:fa000000 r4:ffffffff
<4>[ 4940.808598] [<c03b879c>] (dpram_write+0x0/0x848) from [<c03b9000>]
(dpram_tty_write+0x1c/0x20)
<4>[ 4940.808623] [<c03b8fe4>] (dpram_tty_write+0x0/0x20) from [<c025f3a0>]
(n_tty_write+0x2d4/0x3c0)
<4>[ 4940.808652] [<c025f0cc>] (n_tty_write+0x0/0x3c0) from [<c025c280>]
(tty_write+0x190/0x230)
<4>[ 4940.808678] [<c025c0f0>] (tty_write+0x0/0x230) from [<c0123d90>]
(vfs_write+0xb8/0x144)
<4>[ 4940.808703] [<c0123cd8>] (vfs_write+0x0/0x144) from [<c0123ee0>]
(sys_write+0x44/0x70)
<4>[ 4940.808717]  r8:0000000d r7:00000000 r6:00000000 r5:0001e7d0
r4:e849ba40
<4>[ 4940.808755] [<c0123e9c>] (sys_write+0x0/0x70) from [<c0039680>]
(ret_fast_syscall+0x0/0x30)
<4>[ 4940.808770] er_idle: timer late -2068640, re1300 r5:0000000d
r4:00000000

I felt, something is wrong in dpram_write function, But couldnt exactly
know what happend.
Even i tried disassembling the function, i traced to some normal jump
instruction.

I know this error comes when, some function sleeps in atomic context.

Can anyone pls help me in fixing this..

THanks

-- 
With regards,
Sandeep Kumar Anantapalli,
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