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authorColin Ian King <colin.king@canonical.com>2010-08-02 17:14:43 +0200
committerLen Brown <len.brown@intel.com>2010-09-28 21:40:46 +0200
commit573b638158029898caf9470c8214b7ddd29751e3 (patch)
tree284335b42bb0ba88a1026466080f3f62aa917afc /drivers/char/hpet.c
parentalpha: fix usp value in multithreaded coredumps (diff)
downloadlinux-573b638158029898caf9470c8214b7ddd29751e3.tar.xz
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ACPI: enable repeated PCIEXP wakeup by clearing PCIEXP_WAKE_STS on resume
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>
Diffstat (limited to 'drivers/char/hpet.c')
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