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change to lptioctl

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This commit is contained in:
Geoff Rehmet 1994-04-08 22:13:49 +00:00
parent 758ba6e17a
commit 002aedb676
1 changed files with 11 additions and 4 deletions
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15
sys/i386/isa/lpt.c
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@ -46,7 +46,7 @@
* SUCH DAMAGE.
*
* from: unknown origin, 386BSD 0.1
* $Id: lpt.c,v 1.9 1994/02/22 09:05:13 rgrimes Exp $
* $Id: lpt.c,v 1.10 1994/04/06 16:42:33 csgr Exp $
*/
/*
@ -614,6 +614,7 @@ lptioctl(dev_t dev, int cmd, caddr_t data, int flag)
int error = 0;
struct lpt_softc *sc;
u_int unit = LPTUNIT(minor(dev));
u_char old_sc_irq; /* old printer IRQ status */
sc = lpt_sc + unit;
@ -625,14 +626,20 @@ lptioctl(dev_t dev, int cmd, caddr_t data, int flag)
* If the IRQ status is changed,
* this will only be visible on the
* next open.
*
* If interrupt status changes,
* this gets syslog'd.
*/
old_sc_irq = sc->sc_irq;
if(*(int*)data == 0)
sc->sc_irq &= (~LP_ENABLE_IRQ);
else
sc->sc_irq |= LP_ENABLE_IRQ;
log(LOG_NOTICE, "lpt%c switched to %s mode\n",
(char)unit+'0', (sc->sc_irq & LP_ENABLE_IRQ)?
"interrupt-driven":"polled");
if (old_sc_irq != sc->sc_irq )
log(LOG_NOTICE, "lpt%c switched to %s mode\n",
(char)unit+'0',
(sc->sc_irq & LP_ENABLE_IRQ)?
"interrupt-driven":"polled");
} else /* polled port */
error = EOPNOTSUPP;
break;