diff options
Diffstat (limited to 'sys/arch/hp300/dev/dca.c')
| -rw-r--r-- | sys/arch/hp300/dev/dca.c | 59 |
1 files changed, 37 insertions, 22 deletions
diff --git a/sys/arch/hp300/dev/dca.c b/sys/arch/hp300/dev/dca.c index dd56bbe17ae..71ccfc3e13f 100644 --- a/sys/arch/hp300/dev/dca.c +++ b/sys/arch/hp300/dev/dca.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dca.c,v 1.24 2005/02/12 18:01:08 miod Exp $ */ +/* $OpenBSD: dca.c,v 1.25 2005/02/14 00:52:09 miod Exp $ */ /* $NetBSD: dca.c,v 1.35 1997/05/05 20:58:18 thorpej Exp $ */ /* @@ -521,6 +521,7 @@ dcaintr(arg) #ifdef DEBUG dcaintrcount[code & IIR_IMASK]++; #endif + switch (code & IIR_IMASK) { case IIR_NOPEND: return (1); @@ -533,16 +534,18 @@ dcaintr(arg) #ifdef KGDB #define RCVBYTE() \ code = dca->dca_data; \ - if ((tp->t_state & TS_ISOPEN) == 0) { \ - if (code == FRAME_END && \ - kgdb_dev == makedev(dcamajor, unit)) \ - kgdb_connect(0); /* trap into kgdb */ \ - } else \ - (*linesw[tp->t_line].l_rint)(code, tp) + if (tp != NULL) { \ + if ((tp->t_state & TS_ISOPEN) == 0) { \ + if (code == FRAME_END && \ + kgdb_dev == makedev(dcamajor, unit)) \ + kgdb_connect(0); /* trap into kgdb */ \ + } else \ + (*linesw[tp->t_line].l_rint)(code, tp) \ + } #else #define RCVBYTE() \ code = dca->dca_data; \ - if ((tp->t_state & TS_ISOPEN) != 0) \ + if (tp != NULL && (tp->t_state & TS_ISOPEN) != 0) \ (*linesw[tp->t_line].l_rint)(code, tp) #endif RCVBYTE(); @@ -573,11 +576,13 @@ dcaintr(arg) } break; case IIR_TXRDY: - tp->t_state &=~ (TS_BUSY|TS_FLUSH); - if (tp->t_line) - (*linesw[tp->t_line].l_start)(tp); - else - dcastart(tp); + if (tp != NULL) { + tp->t_state &=~ (TS_BUSY|TS_FLUSH); + if (tp->t_line) + (*linesw[tp->t_line].l_start)(tp); + else + dcastart(tp); + } break; case IIR_RLS: dcaeint(sc, dca->dca_lsr); @@ -587,7 +592,7 @@ dcaintr(arg) return (1); log(LOG_WARNING, "%s: weird interrupt: 0x%x\n", sc->sc_dev.dv_xname, code); - /* fall through */ + /* FALLTHROUGH */ case IIR_MLSC: dcamint(sc); break; @@ -605,22 +610,28 @@ dcaeint(sc, stat) int c; c = dca->dca_data; + +#if defined(DDB) && !defined(KGDB) + if ((sc->sc_flags & DCA_ISCONSOLE) && db_console && (stat & LSR_BI)) { + Debugger(); + return; + } +#endif + + if (tp == NULL) + return; + if ((tp->t_state & TS_ISOPEN) == 0) { #ifdef KGDB /* we don't care about parity errors */ if (((stat & (LSR_BI|LSR_FE|LSR_PE)) == LSR_PE) && - kgdb_dev == makedev(dcamajor, sc->sc_hd->hp_unit) - && c == FRAME_END) + kgdb_dev == makedev(dcamajor, sc->sc_hd->hp_unit) && + c == FRAME_END) kgdb_connect(0); /* trap into kgdb */ #endif return; } -#if defined(DDB) && !defined(KGDB) - if ((sc->sc_flags & DCA_ISCONSOLE) && db_console && (stat & LSR_BI)) { - Debugger(); - return; - } -#endif + if (stat & (LSR_BI | LSR_FE)) c |= TTY_FE; else if (stat & LSR_PE) @@ -642,6 +653,10 @@ dcamint(sc) #ifdef DEBUG dcamintcount[stat & 0xf]++; #endif + + if (tp == NULL) + return; + if ((stat & MSR_DDCD) && (sc->sc_flags & DCA_SOFTCAR) == 0) { if (stat & MSR_DCD) |