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Raise spl to spltty() in polled console input routine dtopKBDGetc(), 

to ensure polled console I/O really is polled.

From Michael L. Hitch <mhitch@lightning.oscs.montana.edu>.
This commit is contained in:
jonathan 1997-07-19 12:00:10 +00:00
parent 73997cc33d
commit 21717110ba
1 changed files with 9 additions and 2 deletions
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11
sys/arch/pmax/dev/dtop.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: dtop.c,v 1.24 1997/06/22 07:42:29 jonathan Exp $ */
/* $NetBSD: dtop.c,v 1.25 1997/07/19 12:00:10 jonathan Exp $ */
/*-
* Copyright (c) 1992, 1993
@ -626,8 +626,10 @@ dtopKBDGetc(dev)
{
register int c;
dtop_softc_t dtop;
int s;
dtop = dtop_cd.cd_devs[0];
s = spltty();
again:
c = -1;
@ -648,7 +650,11 @@ again:
&ds->status, &msg,
DTOP_EVENT_RECEIVE_PACKET, -1);
if (c > 0) return c;
if (c > 0) {
splx(s);
return c;
}
c = -1;
}
@ -660,6 +666,7 @@ again:
goto again;
}
splx(s);
return c;
}