sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

If serial debugging in the boot monitor / kernel is enabled, don't touch

Browse source 
the serial line in use for it (mostly so that input isn't eaten by tty).
This commit is contained in:
Ben Gras 2009-01-29 15:06:40 +00:00
parent d0a2e6b2f4
commit 80f5eea8b8
1 changed files with 10 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/tty/rs232.c
View file

@ -445,9 +445,19 @@ tty_t *tp; /* which TTY */
int line; int line;
port_t this_8250; port_t this_8250;
int irq; int irq;
char l[10];
/* Associate RS232 and TTY structures. */ /* Associate RS232 and TTY structures. */
line = tp - &tty_table[NR_CONS]; line = tp - &tty_table[NR_CONS];
/* See if kernel debugging is enabled; if so, don't initialize this
* serial line, making tty not look at the irq and returning ENXIO
* for all requests on it from userland. (The kernel will use it.)
*/
if(env_get_param(SERVARNAME, l, sizeof(l)-1) == OK && atoi(l) == line) {
return;
}
rs = tp->tty_priv = &rs_lines[line]; rs = tp->tty_priv = &rs_lines[line];
rs->tty = tp; rs->tty = tp;