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HPET: fix ACPI memory range length handling

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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>
This commit is contained in:
Bjorn Helgaas 2006-03-28 17:04:00 -05:00 committed by Len Brown
parent 459c7266d7
commit 9224a867c4
1 changed files with 1 additions and 4 deletions
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5
drivers/char/hpet.c
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@ -925,11 +925,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
status = acpi_resource_to_address64(res, &addr);
if (ACPI_SUCCESS(status)) {
unsigned long size;
size = addr.maximum - addr.minimum + 1;
hdp->hd_phys_address = addr.minimum;
hdp->hd_address = ioremap(addr.minimum, size);
hdp->hd_address = ioremap(addr.minimum, addr.address_length);
if (hpet_is_known(hdp)) {
printk(KERN_DEBUG "%s: 0x%lx is busy\n",