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Protect against wrapping. This appaers to fix some hangs that people

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have seen in the isa pnp case where a resource buts up against
0xffffffff.  This would only impact when the board was booted without
ACPI.

Submitted by: Ed Maste (freebsd-stable <20050103145720.GA90754@sandvine.com>)
MFC After: 5 days
This commit is contained in:
Warner Losh 2005-01-23 03:03:58 +00:00
parent ab4999c061
commit 784d07b40d
1 changed files with 1 additions and 1 deletions
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2
sys/isa/isa_common.c
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@ -147,7 +147,7 @@ isa_find_memory(device_t child, struct isa_config *config,
for (start = config->ic_mem[i].ir_start,
end = config->ic_mem[i].ir_end,
align = config->ic_mem[i].ir_align;
start + size - 1 <= end;
start + size - 1 <= end && start + size > start;
start += align) {
bus_set_resource(child, SYS_RES_MEMORY, i,
start, size);