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ttywait: check conditions again right after oproc

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Obtained from: (I know, but can't say :-)
This commit is contained in:
Andrey A. Chernov 1994-10-15 17:59:02 +00:00
parent 87fe4a3ae4
commit 61181d7df2
1 changed files with 8 additions and 5 deletions
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13
sys/kern/tty.c
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@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)tty.c 8.8 (Berkeley) 1/21/94
* $Id: tty.c,v 1.9 1994/10/06 21:06:34 davidg Exp $
* $Id: tty.c,v 1.10 1994/10/08 22:33:39 phk Exp $
*/
#include <sys/param.h>
@ -980,10 +980,13 @@ ttywait(tp)
(ISSET(tp->t_state, TS_CARR_ON) || ISSET(tp->t_cflag, CLOCAL))
&& tp->t_oproc) {
(*tp->t_oproc)(tp);
SET(tp->t_state, TS_ASLEEP);
error = ttysleep(tp, &tp->t_outq, TTOPRI | PCATCH, ttyout, 0);
if (error)
break;
if ((tp->t_outq.c_cc || ISSET(tp->t_state, TS_BUSY)) &&
(ISSET(tp->t_state, TS_CARR_ON) || ISSET(tp->t_cflag, CLOCAL))) {
SET(tp->t_state, TS_ASLEEP);
error = ttysleep(tp, &tp->t_outq, TTOPRI | PCATCH, ttyout, 0);
if (error)
break;
}
}
splx(s);
return (error);