leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[ACPI] Prefer _CST over FADT for C-state capabilities

Browse Source 
Note: This ACPI standard compliance may cause regression
on some system, if they have _CST present, but _CST value
is bogus. "nocst" module parameter should workaround
that regression.

http://bugzilla.kernel.org/show_bug.cgi?id=5165

Signed-off-by: Venkatesh Pallipadi<venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
(cherry picked from 883baf7f7e81cca26f4683ae0d25ba48f094cc08 commit)
This commit is contained in:
Venkatesh Pallipadi 2005-09-15 12:19:00 -04:00 committed by Len Brown
parent d2ef5ebb4c
commit 6d93c64803
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/acpi/processor_idle.c
View File

@ -690,7 +690,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr)
/* Validate number of power states discovered */ /* Validate number of power states discovered */
if (pr->power.count < 2) if (pr->power.count < 2)
status = -ENODEV; status = -EFAULT;
end: end:
acpi_os_free(buffer.pointer); acpi_os_free(buffer.pointer);
@ -841,11 +841,11 @@ static int acpi_processor_get_power_info(struct acpi_processor *pr)
* this function */ * this function */
result = acpi_processor_get_power_info_cst(pr); result = acpi_processor_get_power_info_cst(pr);
if ((result) || (acpi_processor_power_verify(pr) < 2)) { if (result == -ENODEV)
result = acpi_processor_get_power_info_fadt(pr); result = acpi_processor_get_power_info_fadt(pr);
if ((result) || (acpi_processor_power_verify(pr) < 2))
result = acpi_processor_get_power_info_default_c1(pr); if ((result) || (acpi_processor_power_verify(pr) < 2))
} result = acpi_processor_get_power_info_default_c1(pr);
/* /*
* Set Default Policy * Set Default Policy