[ 104/221] cpuidle / coupled: fix ready counter decrement

Greg Kroah-Hartman
2013-01-16T00:19:57Z

From: Sivaram Nair <sivaramn@nvidia.com>

commit 92638e2facc5330475c7d558acec77721c3214e4 upstream.

The ready_waiting_counts atomic variable is compared against the wrong
online cpu count. The latter is computed incorrectly using logical-OR
instead of bit-OR. This patch fixes that.

Signed-off-by: Sivaram Nair <sivaramn@nvidia.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/cpuidle/coupled.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/cpuidle/coupled.c
+++ b/drivers/cpuidle/coupled.c
@@ -209,7 +209,7 @@ inline int cpuidle_coupled_set_not_ready
int all;
int ret;

- all = coupled->online_count || (coupled->online_count << WAITING_BITS);
+ all = coupled->online_count | (coupled->online_count << WAITING_BITS);
ret = atomic_add_unless(&coupled->ready_waiting_counts,
-MAX_WAITING_CPUS, all);