ACPI: Handle I/O access width requestst that are not a multiple of 8 bits.
We've run into BIOS that hand us 4-bit access width requests for T-state control when the code expected only multipls of 8-bits. Round up. Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Li Shaohua <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
parent
ef54d5ad2f
commit
49fbabf56d
@ -387,17 +387,14 @@ acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
|
||||
if (!value)
|
||||
value = &dummy;
|
||||
|
||||
switch (width) {
|
||||
case 8:
|
||||
*value = 0;
|
||||
if (width <= 8) {
|
||||
*(u8 *) value = inb(port);
|
||||
break;
|
||||
case 16:
|
||||
} else if (width <= 16) {
|
||||
*(u16 *) value = inw(port);
|
||||
break;
|
||||
case 32:
|
||||
} else if (width <= 32) {
|
||||
*(u32 *) value = inl(port);
|
||||
break;
|
||||
default:
|
||||
} else {
|
||||
BUG();
|
||||
}
|
||||
|
||||
@ -408,17 +405,13 @@ EXPORT_SYMBOL(acpi_os_read_port);
|
||||
|
||||
acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
|
||||
{
|
||||
switch (width) {
|
||||
case 8:
|
||||
if (width <= 8) {
|
||||
outb(value, port);
|
||||
break;
|
||||
case 16:
|
||||
} else if (width <= 16) {
|
||||
outw(value, port);
|
||||
break;
|
||||
case 32:
|
||||
} else if (width <= 32) {
|
||||
outl(value, port);
|
||||
break;
|
||||
default:
|
||||
} else {
|
||||
BUG();
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user