[PATCH linux-pm] cpufreq: governors: Fix calculation of wall timein get_cpu_idle_time

From: Stratos Karafotis
Date: Fri Mar 22 2013 - 03:16:45 EST

With commit 8755a8ae31ba213db196324011a0da2a85807f25 the wall in
get_cpu_idle_time is not calculated, when we use ondemand with
io_is_busy = 1, preventing the CPU to increase to max frequency.

Properly, calculate wall time when we use io_is_busy.

Signed-off-by: Stratos Karafotis <stratosk@xxxxxxxxxxxx>
drivers/cpufreq/cpufreq_governor.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index b49d45d..41e5e56 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -53,7 +53,7 @@ static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)

u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
- u64 idle_time = get_cpu_idle_time_us(cpu, NULL);
+ u64 idle_time = get_cpu_idle_time_us(cpu, io_busy ? wall : NULL);

if (idle_time == -1ULL)
return get_cpu_idle_time_jiffy(cpu, wall);

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