Commit b3ba1efe authored Oct 21, 2010 by Myron Stowe Committed by Len Brown Oct 24, 2010

ACPI: Fix ioremap size for MMIO reads and writes



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>

parent f6f94e2a

drivers/acpi/osl.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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:

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