HPET: fix ACPI memory range length handling
ACPI address space descriptors contain _MIN, _MAX, and _LEN. _MIN and _MAX are the bounds within which the region can be moved (this is clarified in Table 6-38 of the ACPI 3.0 spec). We should use _LEN to determine the size of the region, not _MAX - _MIN + 1. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -925,11 +925,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
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status = acpi_resource_to_address64(res, &addr);
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if (ACPI_SUCCESS(status)) {
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unsigned long size;
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size = addr.maximum - addr.minimum + 1;
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hdp->hd_phys_address = addr.minimum;
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hdp->hd_address = ioremap(addr.minimum, size);
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hdp->hd_address = ioremap(addr.minimum, addr.address_length);
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if (hpet_is_known(hdp)) {
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printk(KERN_DEBUG "%s: 0x%lx is busy\n",
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