Hallo,
I hav a projekt for POS-Systeme with a few driver's that
all use a protokoll over the serial device.
I think it is a goo idea when i use the ldisc mechanism
from the tty driver.
My problem is that the ldiscs array in tty_io.c is static
predefined. I have 3 to 10 protokoll's over this mechnism.
I think it is a good idea, to create a dynamic part on the ldiscs
structure.
My idea for a changed tty_register_ldisc funktion.
int tty_register_ldisc(int disc, struct tty_ldisc *new_ldisc)
{
if (disc < N_TTY || disc >= NR_LDISCS)
return -EINVAL;
if (disc == N_LDDYN)
if ((disc = get_free_ldisc()) < 0)
return -EINVAL;
if (new_ldisc) {
.....
return (disc > N_NDDYN) ? disc : 0;
} else {
if (disc > N_LDDYN) set_free_ldisc(disc);
memset(&ldiscs[disc], 0, sizeof(struct tty_ldisc));
return 0;
}
}
Comments ?
Renegard's
Michael Westermann
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