avoid another divide-by-zero while computing geometry.
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@ -1,4 +1,4 @@
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/* $NetBSD: mbr.c,v 1.69 2005/08/28 19:57:25 dsl Exp $ */
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/* $NetBSD: mbr.c,v 1.70 2005/09/22 15:41:14 chs Exp $ */
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/*
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* Copyright 1997 Piermont Information Systems Inc.
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@ -1699,7 +1699,7 @@ guess_biosgeom_from_mbr(mbr_info_t *mbri, int *cyl, int *head, int *sec)
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a2 -= s2;
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num = (uint64_t)h1 * a2 - (quad_t)h2 * a1;
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denom = (uint64_t)c2 * a1 - (quad_t)c1 * a2;
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if (denom != 0 && num % denom == 0) {
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if (num != 0 && denom != 0 && num % denom == 0) {
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xheads = (int)(num / denom);
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xsectors = a1 / (c1 * xheads + h1);
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break;
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