Messages in this thread Patch in this message | | | Date | Fri, 22 Oct 2010 11:35:21 -0700 | From | Greg KH <> | Subject | [54/66] ACPI: enable repeated PCIEXP wakeup by clearing PCIEXP_WAKE_STS on resume |
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2.6.32-stable review patch. If anyone has any objections, please let us know.
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From: Colin Ian King <colin.king@canonical.com>
commit 573b638158029898caf9470c8214b7ddd29751e3 upstream.
Section 4.7.3.1.1 (PM1 Status Registers) of version 4.0 of the ACPI spec concerning PCIEXP_WAKE_STS points out in in the final note field in table 4-11 that if this bit is set to 1 and the system is put into a sleeping state then the system will not automatically wake.
This bit gets set by hardware to indicate that the system woke up due to a PCI Express wakeup event, so clear it during acpi_hw_clear_acpi_status() calls to enable subsequent resumes to work.
BugLink: http://bugs.launchpad.net/bugs/613381
Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/acpi/acpica/aclocal.h | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/acpi/acpica/aclocal.h +++ b/drivers/acpi/acpica/aclocal.h @@ -846,6 +846,7 @@ struct acpi_bit_register_info { ACPI_BITMASK_POWER_BUTTON_STATUS | \ ACPI_BITMASK_SLEEP_BUTTON_STATUS | \ ACPI_BITMASK_RT_CLOCK_STATUS | \ + ACPI_BITMASK_PCIEXP_WAKE_DISABLE | \ ACPI_BITMASK_WAKE_STATUS) #define ACPI_BITMASK_TIMER_ENABLE 0x0001
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