Hi,
I've had quite a lot of problems with the existing Cinergy T2-driver
(keyboard hangs sooner or later). Therefore I've converted the existing
driver to use dvb-usb framework as used in the vp7045-driver. The current
version of the converted driver seems to work OK, although the remote
controller code has been disabled for now.
I'm still wondering about the stream-settings and especially if there
exists a predefined maximum value for the stream count-setting ?
If I use too large value in here, the module will load & initialize just
fine but will crash in unregistering phase when unloading.
.stream = {
.type = USB_BULK,
.count = 7,
.endpoint = 0x02,
.u = {
.bulk = {
.buffersize = 4096,
}
}
},
The value 7 seems to work for the .count-variable, but
when I was testing larger values (like 30) the module crashed the
kernel in unloading phase:
CPU: 0
EIP: 0060:[<c0456076>] Tainted: P B VLI
EFLAGS: 00210246 (2.6.22.4-65.mandalore.fc7 #1)
EIP is at __free_pages_ok+0x42/0x257
eax: 00000000 ebx: c2968400 ecx: 00000000 edx: c09d0ffd
esi: c09d0ffc edi: 00000014 ebp: 00000003 esp: f4bc3e80
ds: 007b es: 007b fs: 0000 gs: 0033 ss: 0068
Process modprobe (pid: 2477, ti=f4bc3000 task=f3a02ba0 task.ti=f4bc3000)
Stack: c2968300 f893c300 00000008 22222222 22222222 f45e6da8 00000000
f45e64e4
00000001 f89136db 8fad8f4e f45e6da8 f45e6da8 f8913c40 f8912ee3
00000001
f45e6000 f45e6e5c f8912399 22222222 0000006c f88f45a8 f7efc418
f88f5320
Call Trace:
[<f89136db>] usb_free_stream_buffers+0x43/0x54 [dvb_usb]
[<f8913c40>] usb_urb_exit+0x53/0x5a [dvb_usb]
[<f8912ee3>] dvb_usb_adapter_dvb_exit+0x52/0x5c [dvb_usb]
[<f8912399>] dvb_usb_exit+0x57/0xcc [dvb_usb]
[<f891243e>] dvb_usb_device_exit+0x30/0x44 [dvb_usb]
[<c057fdfe>] usb_unbind_interface+0x44/0x85
[<c05637d0>] __device_release_driver+0x71/0x8e
[<c0563c66>] driver_detach+0xa5/0xe3
[<c0563346>] bus_remove_driver+0x5a/0x78
[<c057f6df>] usb_deregister+0x79/0x85
[<c043dd84>] sys_delete_module+0x179/0x1a1
[<c0440032>] prepare_processes+0x0/0x1d
[<c0449b9c>] audit_syscall_entry+0x10c/0x136
Just curious to figure out what is the reason for the crash ...
Regards,
Tomi Orava
--
Tomi.Orava@xxxxxxxxxxxxxxxxxx
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