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ACPI: Fix ioremap size for MMIO reads and writes

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The size used for I/O remapping MMIO read and write accesses has not
accounted for the basis of ACPI's Generic Address Structure (GAS)
'Register Bit Width' field which is bits, not bytes.  This patch
adjusts the ioremap() 'size' argument accordingly.

ACPI "Generic Register" reference:
  ACPI Specification, Revision 4.0, Section 5.2.3.1, "Generic Address
  Structure".

Signed-off-by: Myron Stowe <myron.stowe@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Myron Stowe 2010-10-21 14:23:48 -06:00 committed by Len Brown
parent f6f94e2ab1
commit b3ba1efec2
1 changed files with 2 additions and 2 deletions
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4
drivers/acpi/osl.c
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@ -496,7 +496,7 @@ acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
u32 dummy;
void __iomem *virt_addr;
virt_addr = ioremap(phys_addr, width);
virt_addr = ioremap(phys_addr, width / 8);
if (!value)
value = &dummy;
@ -524,7 +524,7 @@ acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
{
void __iomem *virt_addr;
virt_addr = ioremap(phys_addr, width);
virt_addr = ioremap(phys_addr, width / 8);
switch (width) {
case 8: