Hi,
I have an edgeport usb-serial converter and
just checking it. I removed the driver which used to
inseted as soon as I connect, I inserted my module
which tries to display the active config, what
endpoint is there in what interface etc...
and as soon as I do
interface = &udev->actconfig->interface[ifnum];
interface is null, I get error at
"intf_desc = &interface->altsetting[0];"
my id_table has NULL, which should call skel_probe for
all devices connected. how do I use this
interface.....
dmesg shows this ...........
hub.c: new USB device 00:1d.7-8, assigned address 4
usb-skeleton.c:Vendor Id is 00000200, Product Id is
00000201
usb-skeleton.c: Got the Interface
Unable to handle kernel NULL pointer dereference at
virtual address 00000000
printing eip:
e080a77c
*pde = 00000000
Oops: 0000
usb-skeleton i810_audio ac97_codec soundcore ide-cd
cdrom parport_pc lp parport autofs rfcomm l2cap bluez
e100 ipt_REJECT ipt_state ip_conntrack iptable_filte
CPU: 0
EIP: 0060:[<e080a77c>] Tainted: P
EFLAGS: 00010282
EIP is at skel_probe [usb-skeleton] 0x120
(2.4.22-1.2115.nptl)
eax: d9c18600 ebx: 00000000 ecx: d92cb280 edx:
d92cb2d0
esi: 00000000 edi: d06026c0 ebp: da0d1ee0 esp:
da0d1e98
ds: 0068 es: 0068 ss: 0068
Process khubd (pid: 88, stackpage=da0d1000)
Stack: e080b080 00000000 0000005c d92cb280 c8da6d00
df67a060 20000504 d92cb280
da15d000 20000504 df67a060 00000000 00000000
00000000 df67a060 e080b920
e06cae20 d06026c0 00000001 e069eeeb d9c18600
00000000 00000000 00000000
Call Trace: [<e080b080>] .rodata.str1.32
[usb-skeleton] 0x3e0 (0xda0d1e98)
[<e080b920>] skel_driver [usb-skeleton] 0x20
(0xda0d1ed4)
[<e06cae20>] hid_driver [hid] 0x20 (0xda0d1ed8)
[<e069eeeb>] usb_find_interface_driver [usbcore] 0x1fb
(0xda0d1ee4)
[<e080b900>] skel_driver [usb-skeleton] 0x0
(0xda0d1efc)
[<e06b0f60>] usb_driver_list [usbcore] 0x0
(0xda0d1f04)
[<e069f27c>] usb_find_drivers [usbcore] 0x8c
(0xda0d1f18)
[<e06a152b>] usb_new_device_Ra561e410 [usbcore] 0x16b
(0xda0d1f3c)
[<e06a3162>] usb_hub_port_connect_change [usbcore]
0x162 (0xda0d1f5c)
[<e06a2c9c>] usb_hub_port_status [usbcore] 0x6c
(0xda0d1f70)
[<e06a3568>] usb_hub_events [usbcore] 0x2e8
(0xda0d1f90)
[<e06a3605>] usb_hub_thread [usbcore] 0x45
(0xda0d1fbc)
[<e06a35c0>] usb_hub_thread [usbcore] 0x0 (0xda0d1fc4)
[<e06a35c0>] usb_hub_thread [usbcore] 0x0 (0xda0d1fe0)
[<c010741d>] kernel_thread_helper [kernel] 0x5
(0xda0d1ff0)
Code: 8b 36 c7 45 cc 00 00 00 00 83 c4 10 80 7e 04 00
74 37 c7 45
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