* 'interrupt' routine.
*/
-static unsigned int serport_ldisc_receive(struct tty_struct *tty,
- const unsigned char *cp, char *fp, int count)
+static void serport_ldisc_receive(struct tty_struct *tty, const unsigned char *cp, char *fp, int count)
{
struct serport *serport = (struct serport*) tty->disc_data;
unsigned long flags;
- unsigned int ch_flags;
- int ret = 0;
+ unsigned int ch_flags = 0;
int i;
spin_lock_irqsave(&serport->lock, flags);
- if (!test_bit(SERPORT_ACTIVE, &serport->flags)) {
- ret = -EINVAL;
+ if (!test_bit(SERPORT_ACTIVE, &serport->flags))
goto out;
- }
for (i = 0; i < count; i++) {
- switch (fp[i]) {
- case TTY_FRAME:
- ch_flags = SERIO_FRAME;
- break;
-
- case TTY_PARITY:
- ch_flags = SERIO_PARITY;
- break;
-
- default:
- ch_flags = 0;
- break;
+ if (fp) {
+ switch (fp[i]) {
+ case TTY_FRAME:
+ ch_flags = SERIO_FRAME;
+ break;
+
+ case TTY_PARITY:
+ ch_flags = SERIO_PARITY;
+ break;
+
+ default:
+ ch_flags = 0;
+ break;
+ }
}
serio_interrupt(serport->serio, cp[i], ch_flags);
out:
spin_unlock_irqrestore(&serport->lock, flags);
-
- return ret == 0 ? count : ret;
}
/*