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authorMatthew Garrett <mjg@redhat.com>2010-05-11 13:49:25 -0400
committerLen Brown <len.brown@intel.com>2010-05-12 01:12:18 -0400
commitb6dacf63e9fb2e7a1369843d6cef332f76fca6a3 (patch)
tree4b7fbde0071172718270a5646f1168edb6d07023 /include
parentb430acbd7c4b919886fa7fd92eeb7a695f1940d3 (diff)
ACPI: Unconditionally set SCI_EN on resume
The ACPI spec tells us that the firmware will reenable SCI_EN on resume. Reality disagrees in some cases. The ACPI spec tells us that the only way to set SCI_EN is via an SMM call. https://bugzilla.kernel.org/show_bug.cgi?id=13745 shows us that doing so may break machines. Tracing the ACPI calls made by Windows shows that it unconditionally sets SCI_EN on resume with a direct register write, and therefore the overwhelming probability is that everything is fine with this behaviour. Signed-off-by: Matthew Garrett <mjg@redhat.com> Tested-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/acpi.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index b926afe8c03e..87ca4913294c 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -251,7 +251,6 @@ int acpi_check_mem_region(resource_size_t start, resource_size_t n,
251void __init acpi_no_s4_hw_signature(void); 251void __init acpi_no_s4_hw_signature(void);
252void __init acpi_old_suspend_ordering(void); 252void __init acpi_old_suspend_ordering(void);
253void __init acpi_s4_no_nvs(void); 253void __init acpi_s4_no_nvs(void);
254void __init acpi_set_sci_en_on_resume(void);
255#endif /* CONFIG_PM_SLEEP */ 254#endif /* CONFIG_PM_SLEEP */
256 255
257struct acpi_osc_context { 256struct acpi_osc_context {