diff options
Diffstat (limited to 'sys/arch/hp300/dev/dio.c')
| -rw-r--r-- | sys/arch/hp300/dev/dio.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/sys/arch/hp300/dev/dio.c b/sys/arch/hp300/dev/dio.c index c71340be620..705a1b08d7a 100644 --- a/sys/arch/hp300/dev/dio.c +++ b/sys/arch/hp300/dev/dio.c @@ -1,4 +1,4 @@ -/* $OpenBSD: dio.c,v 1.10 2004/12/26 21:41:32 miod Exp $ */ +/* $OpenBSD: dio.c,v 1.11 2005/01/15 22:02:00 miod Exp $ */ /* $NetBSD: dio.c,v 1.7 1997/05/05 21:00:32 thorpej Exp $ */ /*- @@ -148,8 +148,25 @@ dioattach(parent, self, aux) da.da_scode = scode; if (scode == 7 && internalhpib) da.da_id = DIO_DEVICE_ID_IHPIB; - else + else { da.da_id = DIO_ID(va); + /* + * If we probe an unknown device, we do not necessarily + * know how many scodes it will span. + * Extra scodes will usually report an id of zero, + * which would match ihpib! + * Check for this, warn the user, and skip that scode. + */ + if (da.da_id == 0) { + if (didmap) + iounmap(va, NBPG); + printf("%s: warning: select code %d is likely " + "a span of a previous unsupported device\n", + self->dv_xname, scode); + scode++; + continue; + } + } if (DIO_ISFRAMEBUFFER(da.da_id)) da.da_secid = DIO_SECID(va); |