Juan Antonio Garcia schreef:
After a bit of work I have found the reason for getting the "NULL
Pointer dereference" error when the PCTV200e is initialized.
The reason is that in the function "pctv200e_frontend_attach"
"adap->fe" is NULL, and when the mt352 registration fails it continues
being NULL. When the mt2060 is attached, in "mt2060.c" the following
line:
struct dvb_frontend *fe = ops->fe;
Tries to reference the NULL pointer.
I have made the following modification to "pctv200e.c":
static int pctv200e_frontend_attach(struct dvb_usb_adapter *adap)
{
struct dvb_frontend *fe;
if ((adap->fe = dvb_attach(mt352_attach, &pctv200e_mt352_config,
&adap->dev->i2c_adap)) != NULL) {
adap->fe->ops.tuner_ops.calc_regs = dvb_usb_tuner_calc_regs;
return 0;
} else {
warn("frontend_attach failed (mt352)");
fe = kzalloc(sizeof(struct dvb_frontend), GFP_KERNEL);
if (fe == NULL)
return -EIO;
adap->fe = fe;
}
warn("next: attaching tuner.");
After this the PCTV200e registers and unregisters successfully.
So I guess these changes help...
I would like to continue helping. But I would need some directions,
because I don't know what to do next...
And I am really interested in having the PCTV200e under Linux.
Thanks,
Juan
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Juan,
Have a look at the following page fo your patch and how to get it into
mainline. Create a patch file and send it to this list and it should get
incorporated ito mainline as it looks to me as a sound solution to a bug.
http://www.linuxtv.org/v4lwiki/index.php/SubmittingPatches
Regards,
Michel.
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