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ACPI: resume: re-enable SCI-enable workaround

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The BIOS bug workaround mistakenly got disabled
when we followed the ACPI specification more closely
by ignoring OS updates to that bit.

(The BIOS is supposed to update SCI_EN, not the OS)

http://bugzilla.kernel.org/show_bug.cgi?id=13289

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Lin Ming 2009-05-15 22:27:49 -04:00 committed by Len Brown
parent 091bf7624d
commit 975b3c474c
1 changed files with 6 additions and 1 deletions
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7
drivers/acpi/acpica/aclocal.h
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@ -787,7 +787,12 @@ struct acpi_bit_register_info {
/* For control registers, both ignored and reserved bits must be preserved */
#define ACPI_PM1_CONTROL_IGNORED_BITS 0x0201 /* Bits 9, 0(SCI_EN) */
/*
* The ACPI spec says to ignore PM1_CTL.SCI_EN (bit 0)
* but we need to be able to write ACPI_BITREG_SCI_ENABLE directly
* as a BIOS workaround on some machines.
*/
#define ACPI_PM1_CONTROL_IGNORED_BITS 0x0200 /* Bits 9 */
#define ACPI_PM1_CONTROL_RESERVED_BITS 0xC1F8 /* Bits 14-15, 3-8 */
#define ACPI_PM1_CONTROL_PRESERVED_BITS \
(ACPI_PM1_CONTROL_IGNORED_BITS | ACPI_PM1_CONTROL_RESERVED_BITS)