Hi Everybody,
I am developing a driver for clrc632 chip interfaced at spi bus.
My intuition about sending data over spi bus is to create spi_transfers and
add them to the spi_message and then using spi_sync() send it to the device
which is completely handled by atmel_spi driver. I am doing this in my
driver but at the point when spi_sync() is called I get the following
messages. which is something about segmentation fault. I am not
understanding the error.
Is it compulsory to call spi_sync() or spi_async() functions for data
transfer. Is there any other way to do it?
Please help me.
PC is at spi_sync+0x3c/0x6c ttyb8 tty
LR is at clrc632_ioctl+0xc4/0x284ab_dlci_
Enter 'help'
ptyd0
pc : [<c0161860>] lr : [<c01303d8>] Not taintedkern
r7 = 00000000 r6 = C3CE6200 r5 =
ptyd1
sp : c3a21edc ip : c3a21f08 fp : c3a21f04r 6 0lim_allowab_journal_u
[<c0088fb0>] (sh
r10: 00000000 r9 : 00000001 r8 : c36afe98bb ttyvcut
ttyqck_create_kern0
r7 : 00000000 r6 : c36afedc r5 : c36b0004 tyx4
wn_super+0x24/
1f20: 00000001 00000001 00000003 c0021ec4 c3a20000 00000000 c3a21f5c
c3a21f48
1f40: c0082d60 c0130324 c3cf9160 bebf8c16 c3a21f84 c3a21f60 c0082fd8
c0082d0c
1f60: 00000000 00000000 c3cf9160 fffffff7 00000001 00000036 c3a21fa4
c3a21f88
1f80: c0083048 c0082d80 00000000 00000000 0007151c 00000000 00000000
c3a21fa8
1fa0: c0021d20 c0083018 00000000 0007151c 00000003 00000001 bebf8c16
00000003
1fc0: 00000000 0007151c 00000000 00000000 00008c34 00008bf0 00000000
bebf8c30
1fe0: 00000013 bebf8c14 000082a8 00012f04 80000010 00000003 40016420
400236cc
Backtrace:
[<c0161824>] (spi_sync+0x0/0x6c) from [<c01303d8>]
(clrc632_ioctl+0xc4/0x284)
r7 = C36AFEB8 r6 = C36AFEDC r5 = C36B00C0 r4 = C36B0004
[<c0130314>] (clrc632_ioctl+0x0/0x284) from [<c0082d60>]
(do_ioctl+0x64/0x74)
[<c0082cfc>] (do_ioctl+0x0/0x74) from [<c0082fd8>] (vfs_ioctl+0x268/0x298)
r5 = BEBF8C16 r4 = C3CF9160
[<c0082d70>] (vfs_ioctl+0x0/0x298) from [<c0083048>] (sys_ioctl+0x40/0x60)
r7 = 00000036 r6 = 00000001 r5 = FFFFFFF7 r4 = C3CF9160
[<c0083008>] (sys_ioctl+0x0/0x60) from [<c0021d20>]
(ret_fast_syscall+0x0/0x2c)
r6 = 00000000 r5 = 0007151C r4 = 00000000
Code: e5850008 e50b3020 e50b7028 e50b3024 (e590312c)
<1>In Release<1>CLRC pointer at 3278569112
Segmentation fault
Regards,
Nikesh
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