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Allow multiple opens.

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This commit is contained in:
Poul-Henning Kamp 1999-04-25 08:58:10 +00:00
parent f4a23fe8ee
commit 477f9db33d
1 changed files with 10 additions and 5 deletions
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15
sys/dev/ppbus/pps.c
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@ -6,7 +6,7 @@
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ---------------------------------------------------------------------------- * ----------------------------------------------------------------------------
* *
* $Id: pps.c,v 1.14 1999/03/11 15:09:51 phk Exp $ * $Id: pps.c,v 1.15 1999/03/13 16:22:18 phk Exp $
* *
* This driver implements a draft-mogul-pps-api-02.txt PPS source. * This driver implements a draft-mogul-pps-api-02.txt PPS source.
* *
@ -34,6 +34,7 @@
static struct pps_data { static struct pps_data {
int pps_unit; int pps_unit;
int pps_open;
struct ppb_device pps_dev; struct ppb_device pps_dev;
struct pps_state pps; struct pps_state pps;
} *softc[NPPS]; } *softc[NPPS];
@ -126,11 +127,14 @@ ppsopen(dev_t dev, int flags, int fmt, struct proc *p)
sc = softc[unit]; sc = softc[unit];
if (ppb_request_bus(&sc->pps_dev, PPB_WAIT|PPB_INTR)) if (!sc->pps_open) {
return (EINTR); if (ppb_request_bus(&sc->pps_dev, PPB_WAIT|PPB_INTR))
return (EINTR);
ppb_wctr(&sc->pps_dev, 0); ppb_wctr(&sc->pps_dev, 0);
ppb_wctr(&sc->pps_dev, IRQENABLE); ppb_wctr(&sc->pps_dev, IRQENABLE);
sc->pps_open = 1;
}
return(0); return(0);
} }
@ -146,6 +150,7 @@ ppsclose(dev_t dev, int flags, int fmt, struct proc *p)
ppb_wctr(&sc->pps_dev, 0); ppb_wctr(&sc->pps_dev, 0);
ppb_release_bus(&sc->pps_dev); ppb_release_bus(&sc->pps_dev);
sc->pps_open = 0;
return(0); return(0);
} }