Fix panic at extent_free() in boot-time.
(ia->ia_io[0].ir_size is zero if noset iosiz in kernel config file.)
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@ -1,4 +1,4 @@
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/* $NetBSD: mcclock_isa.c,v 1.2 2002/01/07 21:47:03 thorpej Exp $ */
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/* $NetBSD: mcclock_isa.c,v 1.3 2002/01/21 16:26:58 nonaka Exp $ */
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/*
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* Copyright (c) 1995, 1996 Carnegie-Mellon University.
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@ -94,7 +94,7 @@ mcclock_isa_match(parent, match, aux)
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return (0);
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if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr,
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ia->ia_io[0].ir_size, 0, &ioh))
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MCCLOCK_NPORTS, 0, &ioh))
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return (0);
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bus_space_unmap(ia->ia_iot, ioh, MCCLOCK_NPORTS);
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