Author: jkim
Date: Tue Jul 13 02:45:44 2010
New Revision: 209965
URL: http://svn.freebsd.org/changeset/base/209965
Log:
According to ACPICA User Guide and Programmer Reference, the read data must
be zero extended to fill the 32-bit return value even if the bit width of
the port is less than 32.
Modified:
head/sys/dev/acpica/Osd/OsdHardware.c
Modified: head/sys/dev/acpica/Osd/OsdHardware.c
==============================================================================
--- head/sys/dev/acpica/Osd/OsdHardware.c Tue Jul 13 02:45:17 2010
(r209964)
+++ head/sys/dev/acpica/Osd/OsdHardware.c Tue Jul 13 02:45:44 2010
(r209965)
@@ -71,16 +71,13 @@ AcpiOsReadPort(ACPI_IO_ADDRESS InPort, U
switch (Width) {
case 8:
- *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO,
- ACPI_BUS_HANDLE, InPort);
+ *Value = bus_space_read_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
break;
case 16:
- *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO,
- ACPI_BUS_HANDLE, InPort);
+ *Value = bus_space_read_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
break;
case 32:
- *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO,
- ACPI_BUS_HANDLE, InPort);
+ *Value = bus_space_read_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, InPort);
break;
default:
/* debug trap goes here */
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