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Subjectmmc NULL point oops
From
Hello,

I got a oops from android kernel. The attachment tells the story.
Because the source code has some delay to sync with linux. Would
please help to figure out if it is a known problem. Would you please
give me some bright how to fix it up?

/Adam
[ 14.497836] Unable to handle kernel NULL pointer dereference at virtual address 00000024
[ 14.505930] pgd = c0004000
[ 14.508637] [00000024] *pgd=00000000
[ 14.512229] Internal error: Oops: 17 [#1] PREEMPT SMP
[ 14.517279] last sysfs file: /sys/devices/platform/sdhci-tegra.3/mmc_host/mmc0/mmc0:0001/block/mmcblk0/mmcblk0p4/uevent
[ 14.528055] Modules linked in:
[ 14.531124] CPU: 0 Tainted: G W (2.6.36-00028-g51137be #1)
[ 14.537761] PC is at end_bio_bh_io_sync+0x54/0x64
[ 14.542471] LR is at end_bio_bh_io_sync+0x58/0x64
[ 14.547181] pc : [<c00eb460>] lr : [<c00eb464>] psr: 40000093
[ 14.547191] sp : e701fdc0 ip : c0e346b4 fp : 00000000
[ 14.558665] r10: e70f9608 r9 : 00000000 r8 : 00000002
[ 14.563890] r7 : e70f9640 r6 : 0000000c r5 : 00000000 r4 : e70f9640
[ 14.570417] r3 : f0000001 r2 : 000000ba r1 : 00000001 r0 : 00000000
[ 14.576947] Flags: nZcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 14.584344] Control: 10c53c7d Table: 2718004a DAC: 00000017
[ 14.590088]
[ 14.590093] PC: 0xc00eb3e0:
[ 14.594367] b3e0 e1a01004 e1a00006 eb02a1d7 e5943010 e1a00004 e2134080 13e0405e eb000f57
[ 14.602642] b400 e1a00004 e8bd8070 c00eb40c e371005f e92d4070 e1a04000 e5905040 1a000005
[ 14.610919] b420 e3a00007 e2841010 eb02ce4d e3a0000c e1a01005 eb02ce4a e5943010 e3130b02
[ 14.619193] b440 0a000002 e3a0000e e1a01005 eb02ce44 e5941010 e1a00005 e2011001 e1a0e00f
[ 14.627465] b460 e595f024 e1a00004 e8bd4070 ea000f3b e92d4070 e24dd018 e1a04002 e1a05003
[ 14.635737] b480 e59060c0 ebffc9cc e250c000 1a00001a e1a01006 e1a02004 e1a03005 e58dc000
[ 14.644014] b4a0 e3a0c003 e58dc004 e28dc014 e58dc008 e28dc010 e58dc00c ebfed9af e250c000
[ 14.652285] b4c0 1a00000d e59de014 e1a01006 e1a02004 e1a03005 e98d5000 e59de010 e58dc000
[ 14.660561]
[ 14.660566] LR: 0xc00eb3e4:
[ 14.664838] b3e4 e1a00006 eb02a1d7 e5943010 e1a00004 e2134080 13e0405e eb000f57 e1a00004
[ 14.673121] b404 e8bd8070 c00eb40c e371005f e92d4070 e1a04000 e5905040 1a000005 e3a00007
[ 14.681429] b424 e2841010 eb02ce4d e3a0000c e1a01005 eb02ce4a e5943010 e3130b02 0a000002
[ 14.689734] b444 e3a0000e e1a01005 eb02ce44 e5941010 e1a00005 e2011001 e1a0e00f e595f024
[ 14.698044] b464 e1a00004 e8bd4070 ea000f3b e92d4070 e24dd018 e1a04002 e1a05003 e59060c0
[ 14.706351] b484 ebffc9cc e250c000 1a00001a e1a01006 e1a02004 e1a03005 e58dc000 e3a0c003
[ 14.714659] b4a4 e58dc004 e28dc014 e58dc008 e28dc010 e58dc00c ebfed9af e250c000 1a00000d
[ 14.722966] b4c4 e59de014 e1a01006 e1a02004 e1a03005 e98d5000 e59de010 e58dc000 e58de00c
[ 14.731276]
[ 14.731283] SP: 0xe701fd40:
[ 14.735560] fd40 e7962b7c c002e0bc c002f060 c002f060 00001000 c0036bac 60189a58 00000003
[ 14.743864] fd60 00001000 ffffffff e701fdac 0000000c e70f9640 c0030b8c 00000000 00000001
[ 14.752167] fd80 000000ba f0000001 e70f9640 00000000 0000000c e70f9640 00000002 00000000
[ 14.760472] fda0 e70f9608 00000000 c0e346b4 e701fdc0 c00eb464 c00eb460 40000093 ffffffff
[ 14.768778] fdc0 e70f9640 00000000 0000000c c00ef6b8 e70f95c0 e78d3220 0000000c c00c3050
[ 14.777086] fde0 e70f95c0 00000000 00001000 00001000 00000000 00000000 00000000 c00ef6b8
[ 14.785387] fe00 e7257a28 e70f95c0 00001000 c019348c e7257a28 0000000c 00001000 e7257a28
[ 14.793688] fe20 00000000 00000000 00000001 e7be00cc 00000000 e701fe70 00000000 c01936ec
[ 14.801994]
[ 14.802001] IP: 0xc0e34634:
[ 14.806281] 4634 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 14.814581] 4654 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 14.822881] 4674 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 14.831178] 4694 00000000 00000000 00000000 00000000 00000000 000000b7 000000ba 0000001f
[ 14.839479] 46b4 c0b0ce78 c0b0b9d8 c0b11e58 c0b11c38 c0e346c4 c0e346c4 0000fc0c 000002fe
[ 14.847789] 46d4 00000000 020a05f6 00030002 00000000 00000016 000000ba 0000001f c0e209f8
[ 14.856092] 46f4 c0e20a58 c0e346f8 c0e346f8 c0e1bbd8 c0e1bdf8 0a00000c 0000fbfc 00030801
[ 14.864395] 4714 00000000 00000000 00000000 00000019 00000006 00000000 00000000 00000000
[ 14.872699]
[ 14.872706] R3: 0xefffff81:
[ 14.876985] ff80 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.885303] ffa0 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.893611] ffc0 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.901921] ffe0 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.910225] 0000 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.918533] 0020 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.926838] 0040 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.935144] 0060 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.943449] 0080 ******** ******** ******** ******** ******** ******** ******** ********
[ 14.951755]
[ 14.951762] R4: 0xe70f95c0:
[ 14.956042] 95c0 00022d00 00000000 00000000 e7468ba0 f0000029 00000000 00000001 00000001
[ 14.964350] 95e0 00000000 00001000 00001000 00000004 ffffffff 00000001 e70f9608 c00c3164
[ 14.972653] 9600 e70f9640 c00f09a4 c0b0ce60 00001000 00000000 00000000 ffff9be9 00000000
[ 14.980959] 9620 fffff7ee 00000000 ffffffbe 00000000 ffffbff5 00000000 ffffbfdb 00000000
[ 14.989260] 9640 00022cf8 00000000 00000000 e7468ba0 f0000001 00000000 00000001 00000001
[ 14.997563] 9660 00000000 00000800 00000800 00000004 ffffffff 00000000 e70f9688 c00eb40c
[ 15.005865] 9680 00000000 c00f09a4 c0e1c4c0 00001000 00000000 00000000 ffffffb3 00000000
[ 15.014170] 96a0 ffff7fbf 00000000 fffffdfa 00000000 fffffe7f 00000000 fffff3ff 00000000
[ 15.022480]
[ 15.022486] R7: 0xe70f95c0:
[ 15.026767] 95c0 00022d00 00000000 00000000 e7468ba0 f0000029 00000000 00000001 00000001
[ 15.035071] 95e0 00000000 00001000 00001000 00000004 ffffffff 00000001 e70f9608 c00c3164
[ 15.043378] 9600 e70f9640 c00f09a4 c0b0ce60 00001000 00000000 00000000 ffff9be9 00000000
[ 15.051682] 9620 fffff7ee 00000000 ffffffbe 00000000 ffffbff5 00000000 ffffbfdb 00000000
[ 15.059983] 9640 00022cf8 00000000 00000000 e7468ba0 f0000001 00000000 00000001 00000001
[ 15.068286] 9660 00000000 00000800 00000800 00000004 ffffffff 00000000 e70f9688 c00eb40c
[ 15.076594] 9680 00000000 c00f09a4 c0e1c4c0 00001000 00000000 00000000 ffffffb3 00000000
[ 15.084895] 96a0 ffff7fbf 00000000 fffffdfa 00000000 fffffe7f 00000000 fffff3ff 00000000
[ 15.093198]
[ 15.093204] R10: 0xe70f9588:
[ 15.097569] 9588 c06c8920 00000800 00000800 00000000 ffffc3f9 00000000 ffffffda 00000000
[ 15.105871] 95a8 fffffedf 00000000 ffffbbdf 00000000 ffffdfe7 00000000 00022d00 00000000
[ 15.114171] 95c8 00000000 e7468ba0 f0000029 00000000 00000001 00000001 00000000 00001000
[ 15.122471] 95e8 00001000 00000004 ffffffff 00000001 e70f9608 c00c3164 e70f9640 c00f09a4
[ 15.130779] 9608 c0b0ce60 00001000 00000000 00000000 ffff9be9 00000000 fffff7ee 00000000
[ 15.139080] 9628 ffffffbe 00000000 ffffbff5 00000000 ffffbfdb 00000000 00022cf8 00000000
[ 15.147379] 9648 00000000 e7468ba0 f0000001 00000000 00000001 00000001 00000000 00000800
[ 15.155675] 9668 00000800 00000004 ffffffff 00000000 e70f9688 c00eb40c 00000000 c00f09a4
[ 15.163993] Process mmcqd (pid: 53, stack limit = 0xe701e2f0)
[ 15.169748] Stack: (0xe701fdc0 to 0xe7020000)
[ 15.174126] fdc0: e70f9640 00000000 0000000c c00ef6b8 e70f95c0 e78d3220 0000000c c00c3050
[ 15.182322] fde0: e70f95c0 00000000 00001000 00001000 00000000 00000000 00000000 c00ef6b8
[ 15.190518] fe00: e7257a28 e70f95c0 00001000 c019348c e7257a28 0000000c 00001000 e7257a28
[ 15.198714] fe20: 00000000 00000000 00000001 e7be00cc 00000000 e701fe70 00000000 c01936ec
[ 15.206911] fe40: 00000000 e7257a28 e7be00c0 c0194358 e7257a28 e7bdc800 e7be00c0 c02abb2c
[ 15.215110] fe60: 00000000 60179888 c002f060 e701fe84 e701fe84 e701fee4 e701feb4 e701fe3c
[ 15.223304] fe80: c02a5048 00000012 00022cf8 00000900 00000000 00000000 00000000 000000b5
[ 15.231500] fea0: 00000000 00000000 00000000 e701fee4 e701fe70 0000000c 00000000 00000b00
[ 15.239694] fec0: 00000000 00000000 00000000 0000049d 00000000 00000000 00000000 00000000
[ 15.247891] fee0: e701fe70 00989680 00000000 00000200 00000008 00000000 00000200 00001000
[ 15.256087] ff00: e701feb4 e701fe70 00000001 e7001800 e701ff94 c03e4abc e701ff6c 00000002
[ 15.264284] ff20: e7862000 e786201c e7962900 e7962b7c e7962900 e7962b80 e7962b7c c002e0bc
[ 15.272480] ff40: c002f060 c002f060 00000900 00000000 6015f690 e701e000 e701e000 e7970610
[ 15.280679] ff60: 00000000 e701ff74 e7257a28 c019423c e7970610 e701e000 e7be00cc e7be00d4
[ 15.288875] ff80: e7970610 00000000 00000001 e7970838 e7257a28 c02ac648 00000000 e7837de0
[ 15.297072] ffa0: e7be00cc e701ffcc c02ac560 00000000 00000000 00000000 00000000 c007bd80
[ 15.305268] ffc0: e7837de0 00000000 e7be00cc 00000000 00000000 00000000 e701ffd8 e701ffd8
[ 15.313465] ffe0: 00000000 e7837de0 c007bd00 c0031c04 00000013 c0031c04 ffffedcd 00000000
[ 15.321686] [<c00eb460>] (end_bio_bh_io_sync+0x54/0x64) from [<c00ef6b8>] (bio_endio+0x48/0x4c)
[ 15.330418] [<c00ef6b8>] (bio_endio+0x48/0x4c) from [<c00c3050>] (bounce_end_io+0x88/0x94)
[ 15.338709] [<c00c3050>] (bounce_end_io+0x88/0x94) from [<c00ef6b8>] (bio_endio+0x48/0x4c)
[ 15.347014] [<c00ef6b8>] (bio_endio+0x48/0x4c) from [<c019348c>] (blk_update_request+0x1bc/0x408)
[ 15.355918] [<c019348c>] (blk_update_request+0x1bc/0x408) from [<c01936ec>] (blk_update_bidi_request+0x14/0x64)
[ 15.366033] [<c01936ec>] (blk_update_bidi_request+0x14/0x64) from [<c0194358>] (__blk_end_request+0x14/0x34)
[ 15.375908] [<c0194358>] (__blk_end_request+0x14/0x34) from [<c02abb2c>] (mmc_blk_issue_rw_rq+0x404/0x50c)
[ 15.385590] [<c02abb2c>] (mmc_blk_issue_rw_rq+0x404/0x50c) from [<c02ac648>] (mmc_queue_thread+0xe8/0xec)
[ 15.395183] [<c02ac648>] (mmc_queue_thread+0xe8/0xec) from [<c007bd80>] (kthread+0x80/0x88)
[ 15.403566] [<c007bd80>] (kthread+0x80/0x88) from [<c0031c04>] (kernel_thread_exit+0x0/0x8)
[ 15.411936] Code: e5941010 e1a00005 e2011001 e1a0e00f (e595f024)
[ 15.418171] ---[ end trace 07cb96ffa94746c5 ]---
[ 15.422851] Kernel panic - not syncing: Fatal exception
[ 15.428108] Rebooting in 10 seconds..
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