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authorDarrick J. Wong <djwong@us.ibm.com>2006-10-19 23:28:28 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-20 10:26:37 -0700
commitc5a114f1fb2d3c54be62779a705e088471063b47 (patch)
treef3eff245cf2a8ea3d829d59fb5237b07f00830ce
parent74e8b51d254865b8abe4a94b5eb82b1940ec820c (diff)
[PATCH] fix "ACPI: Processor native C-states using MWAIT"
This patch breaks C-state discovery on my IBM IntelliStation Z30 because the return value of acpi_processor_get_power_info_fadt is not assigned to "result" in the case that acpi_processor_get_power_info_cst returns -ENODEV. Thus, if ACPI provides C-state data via the FADT and not _CST (as is the case on this machine), we incorrectly exit the function with -ENODEV after reading the FADT. The attached patch sets the value of result so that we don't exit early. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Acked-by: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> Acked-by: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/acpi/processor_idle.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index e67144cf3c8..65b3f056ad8 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -962,7 +962,7 @@ static int acpi_processor_get_power_info(struct acpi_processor *pr)
result = acpi_processor_get_power_info_cst(pr);
if (result == -ENODEV)
- acpi_processor_get_power_info_fadt(pr);
+ result = acpi_processor_get_power_info_fadt(pr);
if (result)
return result;