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authorVenki Pallipadi <venkatesh.pallipadi@intel.com>2007-07-31 12:04:31 -0700
committerLen Brown <len.brown@intel.com>2007-08-07 15:25:31 -0400
commited3110efb538d7acbf635095c1382118f7414f75 (patch)
treec6fa68e2b4f3b22a3face03288c30033ef13ae60 /drivers/acpi/processor_idle.c
parentd4ac2477fad0f2680e84ec12e387ce67682c5c13 (diff)
ACPI: fix "Time Problems with 2.6.23-rc1-gf695baf2"
Enable C3 without bm control only for CST based C3. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index a898991f77cb..a8634a0655fc 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -969,11 +969,17 @@ static void acpi_processor_power_verify_c3(struct acpi_processor *pr,
}
if (pr->flags.bm_check) {
- /* bus mastering control is necessary */
if (!pr->flags.bm_control) {
- /* In this case we enter C3 without bus mastering */
- ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "C3 support without bus mastering control\n"));
+ if (pr->flags.has_cst != 1) {
+ /* bus mastering control is necessary */
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "C3 support requires BM control\n"));
+ return;
+ } else {
+ /* Here we enter C3 without bus mastering */
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "C3 support without BM control\n"));
+ }
}
} else {
/*