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avoid another divide-by-zero while computing geometry.

This commit is contained in:
chs 2005-09-22 15:41:14 +00:00
parent 3c4f143c6e
commit 1c08e0e246
1 changed files with 2 additions and 2 deletions
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4
distrib/utils/sysinst/mbr.c
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@ -1,4 +1,4 @@
/* $NetBSD: mbr.c,v 1.69 2005/08/28 19:57:25 dsl Exp $ */ /* $NetBSD: mbr.c,v 1.70 2005/09/22 15:41:14 chs Exp $ */
/* /*
* Copyright 1997 Piermont Information Systems Inc. * Copyright 1997 Piermont Information Systems Inc.
@ -1699,7 +1699,7 @@ guess_biosgeom_from_mbr(mbr_info_t *mbri, int *cyl, int *head, int *sec)
a2 -= s2; a2 -= s2;
num = (uint64_t)h1 * a2 - (quad_t)h2 * a1; num = (uint64_t)h1 * a2 - (quad_t)h2 * a1;
denom = (uint64_t)c2 * a1 - (quad_t)c1 * a2; denom = (uint64_t)c2 * a1 - (quad_t)c1 * a2;
if (denom != 0 && num % denom == 0) { if (num != 0 && denom != 0 && num % denom == 0) {
xheads = (int)(num / denom); xheads = (int)(num / denom);
xsectors = a1 / (c1 * xheads + h1); xsectors = a1 / (c1 * xheads + h1);
break; break;