hi,
I am trying to assign a new line discipline to ttyS0 from within the
kernel-space. During the initialization of my module I do the
following:
fp=filp_open(dev,O_RDWR | O_NOCTTY,0);
tty=fp->private_data; //the tty_struct
then I initialize the fields of the new line discipline (ldisc). and
assign it to the tty_struct:
tty->ldisc=ldisc;
It works fine the first time I insert the module, but gets problems
with tty->count if I insert it again.
I tried to call the tty_ioctl function of tty_io.c (with flag
TIOCSETD) using the corresponding field in the file structure
(fp->f_op->ioctl(..)), but it seems to expect a call from user-space,
and returns -EFAULT due to the get_user macro.
I would really appreciate it if someone can tell me how to deal with
this problem.
Regards,
Rabih
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
