Hi,
I was trying to add some of the i2c drivers that are currently in your
CVS tree, to the main kernel tree, but when testing them, I would get an
oops in i2c_register_entry() on the line:
client_tbl->de->owner = client->driver->owner;
right at the end of the function. I've included the oops in full at the end of
this message.
If I enable DEBUG in that file, I get the message:
i2c-proc.o: NULL pointer when trying to install fill_inode fix!
so I'm guessing something isn't being set up correctly somewhere :)
In looking at the differences between the CVS and kernel code, I don't
see any differences around setting up drivers and their syctl files.
I'm seeing this when using the i2c-piix4 and eeprom modules, and when
using the i2c-isa and w83781d modules (they are all that I have the
hardware for right now.)
Any suggestions?
thanks,
greg k-h
------------
Unable to handle kernel NULL pointer dereference at virtual address 00000024
printing eip:
f0c4630a
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0060:[<f0c4630a>] Not tainted
EFLAGS: 00010282
EIP is at i2c_register_entry+0x1ca/0x1e0 [i2c_proc]
eax: f0c58880 ebx: edb6a000 ecx: ed414000 edx: 00000000
esi: edb6a000 edi: 00000000 ebp: 00000019 esp: ebd57ef4
ds: 007b es: 007b ss: 0068
Process modprobe (pid: 895, threadinfo=ebd56000 task=ecd878c0)
Stack: edb6a108 0000044c 00000100 00000019 ec157740 00000001 00000000 ed414000
ed414000 f0c53817 ed414000 f0c55933 f0c5781c 00000001 f0c5593b f0c55933
ed41403c ed414000 00000030 00000000 00000290 f0c3a540 00000290 f0c471c2
Call Trace:
[<f0c53817>] w83781d_detect+0x7f7/0x8c0 [w83781d]
[<f0c55933>] +0x109/0x256 [w83781d]
[<f0c5781c>] w83782d_isa_dir_table_template+0x0/0x478 [w83781d]
[<f0c5593b>] +0x111/0x256 [w83781d]
[<f0c55933>] +0x109/0x256 [w83781d]
[<f0c3a540>] isa_adapter+0x0/0x100 [i2c_isa]
[<f0c471c2>] i2c_detect+0x442/0x480 [i2c_proc]
[<f0c3a540>] isa_adapter+0x0/0x100 [i2c_isa]
[<f0c57080>] w83781d_driver+0x0/0x38 [w83781d]
[<f0c53014>] +0x14/0x20 [w83781d]
[<f0c3a540>] isa_adapter+0x0/0x100 [i2c_isa]
[<f0c56fc0>] addr_data+0x0/0x40 [w83781d]
[<f0c53020>] w83781d_detect+0x0/0x8c0 [w83781d]
[<f0c404cf>] i2c_add_driver+0xef/0x110 [i2c_core]
[<f0c3a540>] isa_adapter+0x0/0x100 [i2c_isa]
[<f0c58880>] +0x0/0x120 [w83781d]
[<f0c38014>] +0x14/0x20 [w83781d]
[<f0c57080>] w83781d_driver+0x0/0x38 [w83781d]
[<f0c559fe>] +0x1d4/0x256 [w83781d]
[<c012fb57>] sys_init_module+0x147/0x210
[<c0109087>] syscall_call+0x7/0xb
Code: 89 42 24 8b 44 24 08 83 c4 14 5b 5e 5f 5d c3 8d b4 26 00 00
