[RFC] Kernel panic down to swiotlb when doing insmod a simple driver

Shawn Lin shawn.lin at rock-chips.com
Fri Jan 13 02:00:17 PST 2017 

Hi,

Sorry for sending this RFC for help as I couldn't find some useful hint
to slove my issue by git-log the swiotlb commit from kernel v4.4 to
v4.9 and I'm also not familar with these stuff. So could you kindly
point me to the right direction to debug it? Thanks. :)

--------------------------------------
We just have a very simple wifi driver *built as ko module* which only
have a probe function to do the basic init work and call SDIO API to
transfer some bytes.

Env: kernel 4.4 stable tree, ARM64(rk3399)

Two cases are included:

The crash case:

u8 __aligned(32) buf[PAGE_SIZE]; //global here in ko driver file
static int wifi_probe(struct sdio_func *func, const struct
sdio_device_id *id)
{
   // prepare some SDIO work before
   printk("wifi_probe: buf = 0x%x\n", buf);
   sdio_memcpy_toio(func, 0, buf, 200);
}

The workable case:

static int wifi_probe(struct sdio_func *func, const struct
sdio_device_id *id)
{

    u8 __aligned(32) buf[PAGE_SIZE]; //move inside the probe function
   // prepare some SDIO work before
   printk("wifi_probe: buf = 0x%x\n", buf);
   sdio_memcpy_toio(func, 0, buf, 200);
}

-------------
How to repro it:
insmod the KO module, then kernel panic when trying to bounce a buffer
in swiotlb but the workable case I didn't see kernel did that memcpy
by adding some log, strange?

parsing vmlinux, it locates to arch/arm64/lib/copy_template.S:167

165 .Lcpy_body_large:
166         /* pre-get 64 bytes data. */
167         ldp1    A_l, A_h, src, #16
168         ldp1    B_l, B_h, src, #16
169         ldp1    C_l, C_h, src, #16
170         ldp1    D_l, D_h, src, #16

--------------------------------------------------------------

The full crash log looks like

[  236.748210] wifi_probe: buf = 0xffffff8000a40b80
[  236.748258] swiotlb_tbl_map_single: orig_addr = 0xfffffffff8c40b80, 
tlb_addr = 0xf7eae000 //I added log here
[  236.748276] Unable to handle kernel paging request at virtual address 
fffffffff8c40b80
[  236.776486] pgd = ffffffc0b3417000
[  236.776789] [fffffffff8c40b80] *pgd=00000000b3427003, 
*pud=00000000b3427003, *pmd=0000000000000000
[  236.777601] Internal error: Oops: 96000005 [#1] PREEMPT SMP
[  236.778093] Modules linked in: drvtst(O+)
[  236.778463] CPU: 0 PID: 1918 Comm: insmod Tainted: G           O 
4.4.36 #25
[  236.779096] Hardware name: Rockchip RK3399 Evaluation Board v3 edp 
(Android) (DT)
[  236.779753] task: ffffffc0e3db0c40 ti: ffffffc0b342c000 task.ti: 
ffffffc0b342c000
[  236.780418] PC is at __memcpy+0x100/0x180
[  236.780777] LR is at swiotlb_tbl_map_single+0x254/0x274
[  236.781237] pc : [<ffffff80083579c0>] lr : [<ffffff800837cf70>] 
pstate: 20000145
[  236.781885] sp : ffffffc0b342f530
[  236.782178] x29: ffffffc0b342f530 x28: 0000000000000001
[  236.782653] x27: 0000000000200000 x26: ffffffc0e8874810
[  236.783127] x25: 0000000000000001 x24: 00000000000000c8
[  236.783601] x23: fffffffff8c40b80 x22: ffffff8009158480
[  236.784075] x21: 00000000f7eae000 x20: ffffff8009158000
[  236.784550] x19: 00000000f7eae000 x18: 00000000004ff888
[  236.785023] x17: 0000000000000000 x16: ffffff80081bbc74
[  236.785498] x15: 0b030f0000000000 x14: 3034633866666666
[  236.785972] x13: 6666666666783020 x12: 3d20726464615f67
[  236.786446] x11: 69726f20656c676e x10: 69735f70616d5f6c
[  236.786919] x9 : 62745f626c746f69 x8 : ffffff80082e8c1c
[  236.787392] x7 : 0000000000000000 x6 : ffffffc0f7eae000
[  236.787866] x5 : 0000000000000001 x4 : 0000000000000000
[  236.788340] x3 : 0000000000000007 x2 : 0000000000000048
[  236.788815] x1 : fffffffff8c40b80 x0 : ffffffc0f7eae000
[  236.789291]
[  236.789291] PC: 0xffffff8008357940:
[  236.789728] 7940  36180062 f8408423 f80084c3 36100062 b8404423 
b80044c3 36080062 78402423
[  236.790484] 7960  780024c3 36000562 38401423 380014c3 14000028 
f1020042 5400024a a8c12027
[  236.791236] 7980  a88120c7 a8c12829 a8c1302b a88128c9 a88130cb 
a8c1382d a88138cd f240145f
[  236.791988] 79a0  54fffba1 1400001b d503201f d503201f d503201f 
d503201f d503201f d503201f
[  236.792739] 79c0  a8c12027 a8c12829 a8c1302b a8c1382d a88120c7 
a8c12027 a88128c9 a8c12829
[  236.793490] 79e0  a88130cb a8c1302b a88138cd a8c1382d f1010042 
54fffeea a88120c7 a88128c9
[  236.794243] 7a00  a88130cb a88138cd f240145f 54fff841 d65f03c0 
d503201f d503201f d503201f
[  236.794995] 7a20  d503201f d503201f d503201f d503201f d503201f 
d503201f d503201f d503201f
[  236.795748]
[  236.795748] LR: 0xffffff800837cef0:
[  236.796186] cef0  d0004f81 aa1a03e0 912ad821 aa1803e2 9404fda9 
1400001b 6b19001f 540000e2
[  236.796939] cf10  0b130003 53155001 11000400 8b21c2e1 f8237841 
17fffff9 d0004f80 b0003821
[  236.797694] cf30  912b7800 91344021 aa1703e2 aa1503e3 aa1503f3 
97f784ba 7100079f 54000128
[  236.798445] cf50  d0005fc0 aa1803e2 f9453c01 cb0102a0 cb0102e1 
b25a6400 b25a6421 97ff6a55
[  236.799197] cf70  aa1303e0 a94153f3 a9425bf5 a94363f7 a9446bf9 
a94573fb a8c77bfd d65f03c0
[  236.799949] cf90  d4210000 90006ee5 911200a5 a9bf7bfd 910003fd 
f94018a0 f9401ca5 cb000020
[  236.800703] cfb0  934ba800 f86078a5 b10004bf 540003e0 92402820 
8b0000a5 34000084 7100049f
[  236.801455] cfd0  54000180 14000018 721e787f 540000c1 d0005fc0 
f9453c03 cb0300a0 cb030021
[  236.802209]
[  236.802209] SP: 0xffffffc0b342f4b0:
[  236.802647] f4b0  09158480 ffffff80 f8c40b80 ffffffff 000000c8 
00000000 00000001 00000000
[  236.803400] f4d0  e8874810 ffffffc0 00200000 00000000 00000001 
00000000 b342f530 ffffffc0
[  236.804152] f4f0  0837cf70 ffffff80 b342f530 ffffffc0 083579c0 
ffffff80 20000145 00000000
[  236.804903] f510  ffffffff 00000000 00000140 00000000 00000000 
00000080 00000000 00000000
[  236.805654] f530  b342f5a0 ffffffc0 0837dc18 ffffff80 00000001 
00000000 b342f890 ffffffc0
[  236.806405] f550  00000001 00000000 00000000 00000000 00000000 
00000000 09158000 ffffff80
[  236.807157] f570  08f76000 ffffff80 09158000 ffffff80 b342f890 
ffffffc0 e8874810 ffffffc0
[  236.807909] f590  00000140 00000000 001efd5c 00000000 b342f600 
ffffffc0 0809359c ffffff80
[  236.808662]
[  236.808662] X0: 0xffffffc0f7eadf80:
[  236.809099] df80  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.809852] dfa0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.810603] dfc0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.811355] dfe0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.812106] e000  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.812858] e020  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.813608] e040  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.814360] e060  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.815114]
[  236.815114] X1: 0xfffffffff8c40b00:
[  236.815552] 0b00  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.816309] 0b20  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.817065] 0b40  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.817820] 0b60  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.818575] 0b80  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.819328] 0ba0  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.820082] 0bc0  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.820836] 0be0  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.821595]
[  236.821595] X6: 0xffffffc0f7eadf80:
[  236.822032] df80  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.822785] dfa0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.823537] dfc0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.824289] dfe0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.825040] e000  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.825792] e020  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.826543] e040  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.827295] e060  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.828049]
[  236.828049] X8: 0xffffff80082e8b9c:
[  236.828487] 8b9c  14000006 f9400453 14000004 f9400853 14000002 
f9400c53 aa1303e0 94000529
[  236.829239] 8bbc  aa1303e0 94000532 52800000 14000002 128002a0 
f9400bf3 a8c27bfd d65f03c0
[  236.829993] 8bdc  a9bf7bfd 71001c1f aa0403e1 910003fd 128002a3 
54000101 f94048e0 12800163
[  236.830746] 8bfc  f9400c00 b4000080 2a0603e2 9400049e 2a0003e3 
2a0303e0 a8c17bfd d65f03c0
[  236.831497] 8c1c  a9b97bfd 7100081f 910003fd a90363f7 d0006477 
f90023f9 a9025bf5 a90153f3
[  236.832249] 8c3c  f9452ae2 aa0403f6 f90037a2 53001cb4 aa0603f5 
f94048f3 54000061 f9400660
[  236.833002] 8c5c  14000008 71000c1f 54000061 f9400a60 14000004 
71001c1f 54000101 f9400e60
[  236.833754] 8c7c  12800167 b40008a0 aa1603e1 2a1503e2 94000426 
14000040 128002a7 350007e0
[  236.834510]
[  236.834510] X16: 0xffffff80081bbbf4:
[  236.834955] bbf4  2a1503e1 97fffec4 3100101f 54000261 d5384100 
f9400800 90000002 912c4042
[  236.835708] bc14  91102003 f9020402 f9000476 b9001075 37f80114 
f9401fa0 f9000c60 f94023a0
[  236.836460] bc34  f9001060 52800020 b9001460 14000002 b900147f 
12804060 f94027a2 93407c00
[  236.837212] bc54  f9452a61 eb01005f 54000040 97fb80af a94153f3 
a9425bf5 a8c57bfd d65f03c0
[  236.837964] bc74  a9b67bfd 910003fd a9025bf5 f0006dd6 f90023f9 
a90363f7 aa0003f8 aa0103f7
[  236.838716] bc94  f9452ac0 aa0403f9 a90153f3 f9004fa0 aa0203f3 
aa0303f4 b4000302 d5384100
[  236.839466] bcb4  f9400400 aa0203e3 b1004063 fa403062 9a9f87e1 
9101e3a0 b40000c1 aa0203e1
[  236.840218] bcd4  d2800202 94066c4a b4000080 1400001d a9007c1f 
1400001b f9403fa1 910223a0
[  236.840973]
[  236.840973] X20: 0xffffff8009157f80:
[  236.841418] 7f80  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.842169] 7fa0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.842920] 7fc0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.843672] 7fe0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.844422] 8000  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.845174] 8020  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.845925] 8040  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.846677] 8060  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.847431]
[  236.847431] X22: 0xffffff8009158400:
[  236.847876] 8400  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.848628] 8420  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.849379] 8440  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.850130] 8460  00000000 00000000 00000000 00000000 00030003 
00000000 00f100f1 00000000
[  236.850882] 8480  00000080 00000000 f7ea6000 00000000 f7eee000 
00000000 00000000 00000000
[  236.851633] 84a0  00010001 00000001 f7f75000 ffffffc0 f7eae000 
00000000 f7ea5000 ffffffc0
[  236.852388] 84c0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.853139] 84e0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.853892]
[  236.853892] X23: 0xfffffffff8c40b00:
[  236.854338] 0b00  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.855093] 0b20  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.855846] 0b40  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.856601] 0b60  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.857356] 0b80  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.858109] 0ba0  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.858864] 0bc0  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.859620] 0be0  ******** ******** ******** ******** ******** 
******** ******** ********
[  236.860377]
[  236.860377] X26: 0xffffffc0e8874790:
[  236.860822] 4790  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.861573] 47b0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.862324] 47d0  00000000 00000000 00000000 00000000 00000000 
00000000 00000000 00000000
[  236.863075] 47f0  00000000 00000000 00000000 00000000 e885d140 
ffffffc0 ffffffff 00000000
[  236.863828] 4810  08fefcc0 ffffff80 e933b480 ffffffc0 e885d140 
ffffffc0 e5b7c020 ffffffc0
[  236.864581] 4830  e5b24430 ffffffc0 08fefcd0 ffffff80 e929d480 
ffffffc0 08fef9d0 ffffff80
[  236.865335] 4850  e88999d8 ffffffc0 00000005 00000007 00000000 
00000000 00000000 00000000
[  236.866087] 4870  00000001 00000000 e8874878 ffffffc0 e8874878 
ffffffc0 00000000 00000000
[  236.866843]
[  236.866843] X29: 0xffffffc0b342f4b0:
[  236.867288] f4b0  09158480 ffffff80 f8c40b80 ffffffff 000000c8 
00000000 00000001 00000000
[  236.868041] f4d0  e8874810 ffffffc0 00200000 00000000 00000001 
00000000 b342f530 ffffffc0
[  236.868794] f4f0  0837cf70 ffffff80 b342f530 ffffffc0 083579c0 
ffffff80 20000145 00000000
[  236.869547] f510  ffffffff 00000000 00000140 00000000 00000000 
00000080 00000000 00000000
[  236.870297] f530  b342f5a0 ffffffc0 0837dc18 ffffff80 00000001 
00000000 b342f890 ffffffc0
[  236.871049] f550  00000001 00000000 00000000 00000000 00000000 
00000000 09158000 ffffff80
[  236.871800] f570  08f76000 ffffff80 09158000 ffffff80 b342f890 
ffffffc0 e8874810 ffffffc0
[  236.872552] f590  00000140 00000000 001efd5c 00000000 b342f600 
ffffffc0 0809359c ffffff80
[  236.873304]
[  236.873442] Process insmod (pid: 1918, stack limit = 0xffffffc0b342c020)
[  236.874031] Stack: (0xffffffc0b342f530 to 0xffffffc0b3430000)
[  236.874539] f520:                                   ffffffc0b342f5a0 
ffffff800837dc18
[  236.875226] f540: 0000000000000001 ffffffc0b342f890 0000000000000001 
0000000000000000
[  236.875915] f560: 0000000000000000 ffffff8009158000 ffffff8008f76000 
ffffff8009158000
[  236.876605] f580: ffffffc0b342f890 ffffffc0e8874810 0000000000000140 
00000000001efd5c
[  236.877293] f5a0: ffffffc0b342f600 ffffff800809359c ffffffc0b342f890 
ffffffc0e8874810
[  236.877981] f5c0: 0000000000000000 0000000000000001 0000000000000001 
ffffffc0b342f938
[  236.878670] f5e0: ffffffc0b342f8f0 ffffffc0e5b7c738 0000000000001000 
0000000000000000
[  236.879358] f600: ffffffc0b342f640 ffffff800871113c ffffffc0b342f8f0 
ffffff8008f88b60
[  236.880047] f620: 0000000000000000 ffffffc0e8874810 0000000000000001 
ffffff8000a40b80
[  236.880735] f640: ffffffc0b342f6a0 ffffff80087129cc ffffffc0e5b45018 
ffffffc0b342f8b0
[  236.881423] f660: ffffff8008f76000 0000000020002775 ffffffc0e5b7c700 
ffffffc0b342f8b0
[  236.882112] f680: ffffff8008f76000 0000000000000001 ffffffc0b342f890 
0000000000000001
[  236.882800] f6a0: ffffffc0b342f730 ffffff80087132e0 ffffffc0e5b45018 
ffffffc0e5b7c000
[  236.883489] f6c0: ffffffc0e5b7c700 ffffff8000a40b80 ffffff8008f76000 
ffffffc0b342f8b0
[  236.884178] f6e0: ffffffc0b342f938 ffffffc0b342f8f0 0000000000001000 
ffffff800871325c
[  236.884867] f700: ffffffc0e5b45018 ffffffc0e5b7c000 ffffffc0e5b7c700 
ffffff8000a40b80
[  236.885555] f720: ffffff8008f76000 cb88537fdc8ba624 ffffffc0b342f770 
ffffff80086f8b44
[  236.886243] f740: ffffffc0e5b7c000 00000000000001f4 00000000ffffff85 
ffffff80086f8ac0
[  236.886931] f760: ffffffc0e5b7c000 ffffffc0b342f938 ffffffc0b342f7a0 
ffffff80087ae0e8
[  236.887619] f780: ffffffc0b342f938 ffffffc0e5b7c000 00000000ffffff85 
ffffffc0b342f938
[  236.888308] f7a0: ffffffc0b342f7c0 ffffff80086f9c74 ffffffc0e5b7c000 
ffffffc0b342f938
[  236.888996] f7c0: ffffffc0b342f800 ffffff800870421c 00000000000000c8 
0000000000000001
[  236.889685] f7e0: ffffffc0e5b7c800 ffffff8000a40b80 ffffff8008f76000 
ffffffc0b342f8b0
[  236.890372] f800: ffffffc0b342f9a0 ffffff8008705800 00000000000000c8 
0000000000000000
[  236.891061] f820: ffffff8000a40b80 0000000000000001 ffffff8008dfdc48 
ffffff8008dfdc81
[  236.891748] f840: ffffff8008dfdcdb 0000000000000001 ffffffc0e5b44c00 
00000000000000c8
[  236.892436] f860: ffffffc0e5b44c00 00000000000000c8 000000000000002a 
ffffff800911d000
[  236.893125] f880: 0000000000000140 ffffff8000000000 03ffffbdbfe31002 
000000c800000b80
[  236.893813] f8a0: 0000000000000000 0000000000000000 940000c800000035 
0000000000000000
[  236.894501] f8c0: 0000000000000000 00000000000001b5 00000000ffffff8d 
0000000000000000
[  236.895190] f8e0: ffffffc0b342f8f0 ffffffc0b342f938 000000003b9aca00 
00000001000000c8
[  236.895878] f900: 00000100ffffff8d 0000000000000000 0000000000000000 
ffffffc0b342f938
[  236.896566] f920: 0000000000000001 ffffffc0b342f890 0000000000000000 
0000000000000000
[  236.897254] f940: ffffffc0b342f8b0 ffffffc0b342f8f0 0000000000000000 
0000000000000000
[  236.897942] f960: 0000000000000000 ffffffc0b342f968 ffffffc0b342f968 
ffffff80086f8b98
[  236.898630] f980: 0000000000000000 0000000000000000 0000000000000000 
cb88537fdc8ba624
[  236.899319] f9a0: ffffffc0b342fa00 ffffff8008705954 ffffffc0e5b44c00 
00000000000000c8
[  236.900007] f9c0: ffffff8000a40b80 ffffff8000a410a0 ffffff8000a407d8 
0000000000000029
[  236.900695] f9e0: 0000000000000000 ffffffc0e926a480 0000000000000001 
0000000000000038
[  236.901384] fa00: ffffffc0b342fa10 ffffff8000a40108 ffffffc0b342fa60 
ffffff8008704734
[  236.902072] fa20: ffffffc0e5b44c08 0000000000000000 ffffffc0e5b44c00 
ffffff8000a40410
[  236.902760] fa40: ffffff8000a407d8 0000000000000029 0000000000000000 
ffffff8008704704
[  236.903447] fa60: ffffffc0b342faa0 ffffff80084bfd6c ffffffc0e5b44c08 
0000000000000000
[  236.904136] fa80: ffffff800915d000 ffffff8008fef000 ffffff8000a407d8 
0000000000000000
[  236.904824] faa0: ffffffc0b342faf0 ffffff80084bff68 ffffffc0e5b44c08 
ffffffc0e5b44c68
[  236.905512] fac0: ffffff8000a407d8 ffffff80084bff04 ffffff8009028a38 
0000000000000000
[  236.906201] fae0: 0000000000000000 ffffff80084bff40 ffffffc0b342fb20 
ffffff80084bee18
[  236.906889] fb00: 0000000000000000 ffffff8008f76000 ffffff8000a407d8 
ffffff80084bff04
[  236.907577] fb20: ffffffc0b342fb70 ffffff80084bf8ac ffffff8000a407d8 
0000000000000000
[  236.908265] fb40: ffffffc0f6e996c0 ffffff8008fef000 ffffffc0b342fb60 
ffffffc0e8b8f4a8
[  236.908953] fb60: ffffffc0e5486ea8 cb88537fdc8ba624 ffffffc0b342fb80 
ffffff80084bf45c
[  236.909641] fb80: ffffffc0b342fbc0 ffffff80084c0afc ffffff8000a407d8 
ffffff8008f84b20
[  236.910329] fba0: 0000000000000000 ffffff8008f76000 ffffff8008f84b20 
cb88537fdc8ba624
[  236.911017] fbc0: ffffffc0b342fbf0 ffffff8008704580 ffffff8000a44000 
ffffff8008f84b20
[  236.911706] fbe0: ffffffc0f6dda1c0 ffffff8008f76000 ffffffc0b342fc00 
ffffff8000a40228
[  236.912394] fc00: ffffffc0b342fc10 ffffff8000a4400c ffffffc0b342fc20 
ffffff8008082ba4
[  236.913082] fc20: ffffffc0b342fcb0 ffffff800815e564 ffffff8000a40880 
ffffff8008f96000
[  236.913770] fc40: 0000000000000001 ffffffc0d58a1e40 ffffff8008a4a2d0 
0000000000000000
[  236.914458] fc60: 0000000000000001 ffffff8008f96000 ffffff8008a4a2d0 
0000000000000000
[  236.915146] fc80: 0000000000000000 ffffffc0e926a480 0000000000000001 
ffffffc0b342fe50
[  236.915835] fca0: 0000000000000001 cb88537fdc8ba624 ffffffc0b342fce0 
ffffff80081150f0
[  236.916523] fcc0: ffffff8000a40880 ffffffc0b342fe50 0000000000000001 
ffffff8008f96000
[  236.917212] fce0: ffffffc0b342fe00 ffffff800811562c 00000000000014d8 
ffffff800ca364d8
[  236.917900] fd00: 0000007f922804e8 0000000000000000 ffffff8008f76000 
000000555bb25d20
[  236.918588] fd20: 0000000000010000 ffffffc0b342c000 ffffff8008a42000 
ffffffc0b342c000
[  236.919275] fd40: 0000000000000077 0000000000000076 0000000000000064 
0000000000000072
[  236.919963] fd60: 000000000000006e 0000000000000018 0000000000000040 
0000000000000040
[  236.920652] fd80: ffffff8000a42500 ffffff8008f76000 0000000000000124 
ffffff8008112064
[  236.921340] fda0: ffffff8008f76000 000000555bb25d20 000000000000011d 
0000000000000069
[  236.922028] fdc0: ffffffc0b342fe00 0000000000000000 0000000000000000 
0000000000000000
[  236.922716] fde0: 0000007f00000000 0000000000000000 ffffffc000000000 
cb88537fdc8ba624
[  236.923405] fe00: 0000000000000000 ffffff80080826f0 0000000000000000 
0000007f9223f010
[  236.924092] fe20: ffffffffffffffff 0000007f9235e904 0000000060000000 
0000000000000015
[  236.924780] fe40: 000000000000011d 0000000000000069 ffffff800c9f5000 
00000000000414d8
[  236.925469] fe60: ffffff800ca35bd8 ffffff800ca1711f ffffff800ca17d08 
0000000000002500
[  236.926157] fe80: 0000000000002b00 0000000000000000 0000000000000000 
0000000000000dd8
[  236.926844] fea0: 0000002300000022 000000000000000d 0000000000000009 
cb88537fdc8ba624
[  236.927532] fec0: 0000007f9223f010 00000000000414d8 000000555bb25d20 
0000000000000000
[  236.928220] fee0: 0000000000000001 0000000000000000 0000000000000000 
0000007f9223f000
[  236.928909] ff00: 0000000000000069 0000007f9223f010 0000000000042000 
0000000000000001
[  236.929597] ff20: 0000007f92280fe0 0000007f92281000 0000007f923f4a70 
0000000000002000
[  236.930285] ff40: 000000555bb23ae0 0000007f9235e8e4 0000000000000f00 
00000000000414d8
[  236.930972] ff60: 0000007f9223f010 0000000000000003 00000000000414d8 
0000000000000000
[  236.931660] ff80: 0000000000000000 000000555bb26d20 0000000000000010 
0000000000000000
[  236.932348] ffa0: 0000000000000000 0000007fe750e100 000000555bade83c 
0000007fe750e0b0
[  236.933036] ffc0: 0000007f9235e904 0000000060000000 0000007f9223f010 
0000000000000069
[  236.933725] ffe0: 0000000000000000 0000000000000000 3420320216190109 
7375020101333632
[  236.934409] Call trace:
[  236.934632] Exception stack(0xffffffc0b342f340 to 0xffffffc0b342f470)
[  236.935200] f340: 00000000f7eae000 0000008000000000 ffffffc0b342f530 
ffffff80083579c0
[  236.935888] f360: 0000000020000145 0000000000000053 ffffff8008f93688 
000000000007e7b8
[  236.936577] f380: 0000000000000002 ffffff8008f93688 0000000000000063 
000000000909b7e8
[  236.937266] f3a0: ffffffc0b342f440 ffffff80080e8d08 ffffff8008f76000 
ffffff80080e8cd4
[  236.937953] f3c0: 00000000f7eae000 ffffff8009158480 fffffffff8c40b80 
00000000000000c8
[  236.938641] f3e0: 0000000000000001 ffffffc0e8874810 0000000000200000 
cb88537fdc8ba624
[  236.939329] f400: ffffffc0f7eae000 fffffffff8c40b80 0000000000000048 
0000000000000007
[  236.940017] f420: 0000000000000000 0000000000000001 ffffffc0f7eae000 
0000000000000000
[  236.940705] f440: ffffff80082e8c1c 62745f626c746f69 69735f70616d5f6c 
69726f20656c676e
[  236.941392] f460: 3d20726464615f67 6666666666783020
[  236.941826] [<ffffff80083579c0>] __memcpy+0x100/0x180
[  236.942274] [<ffffff800837dc18>] swiotlb_map_sg_attrs+0xa8/0x170
[  236.942810] [<ffffff800809359c>] __swiotlb_map_sg_attrs+0x24/0x8c
[  236.943353] [<ffffff800871113c>] 
dw_mci_pre_dma_transfer.isra.16+0xf0/0x11c
[  236.943967] [<ffffff80087129cc>] __dw_mci_start_request+0x17c/0x4d0
[  236.944520] [<ffffff80087132e0>] dw_mci_request+0xb8/0xf0
[  236.945002] [<ffffff80086f8b44>] __mmc_start_request+0x9c/0xc0
[  236.945520] [<ffffff80087ae0e8>] mmc_start_request.part.17+0x100/0x11c
[  236.946097] [<ffffff80086f9c74>] mmc_wait_for_req+0x78/0x1a8
[  236.946600] [<ffffff800870421c>] mmc_io_rw_extended+0x27c/0x2fc
[  236.947124] [<ffffff8008705800>] sdio_io_rw_ext_helper+0x1e4/0x238
[  236.947670] [<ffffff8008705954>] sdio_memcpy_toio+0x24/0x2c
[  236.948169] [<ffffff8000a40108>] wifi_probe+0xa8/0x198 [drvtst]
[  236.948708] [<ffffff8008704734>] sdio_bus_probe+0xb0/0x140
[  236.949195] [<ffffff80084bfd6c>] driver_probe_device+0x118/0x2b0
[  236.949724] [<ffffff80084bff68>] __driver_attach+0x64/0x90
[  236.950212] [<ffffff80084bee18>] bus_for_each_dev+0x80/0xb0
[  236.950706] [<ffffff80084bf8ac>] driver_attach+0x20/0x28
[  236.951176] [<ffffff80084bf45c>] bus_add_driver+0xe8/0x1ec
[  236.951661] [<ffffff80084c0afc>] driver_register+0x98/0xe4
[  236.952147] [<ffffff8008704580>] sdio_register_driver+0x24/0x2c
[  236.952675] [<ffffff8000a40228>] wifi_sdio_init+0x30/0x68 [drvtst]
[  236.953241] [<ffffff8000a4400c>] wifi_drv_init+0xc/0x38 [drvtst]
[  236.953789] [<ffffff8008082ba4>] do_one_initcall+0x17c/0x198
[  236.954293] [<ffffff800815e564>] do_init_module+0x60/0x1b8
[  236.954779] [<ffffff80081150f0>] load_module+0x1660/0x1a50
[  236.955264] [<ffffff800811562c>] SyS_init_module+0x14c/0x180
[  236.955765] [<ffffff80080826f0>] el0_svc_naked+0x24/0x28
[  236.956237] Code: d503201f d503201f d503201f d503201f (a8c12027)
[  236.956794] ---[ end trace 2030cf6e7c948d05 ]---
[  236.984113] Kernel panic - not syncing: Fatal exception in interrupt

-- 
Best Regards
Shawn Lin

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