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cpuquiet: balanced governor requires cpufreq

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The balanced governor relies on cpufreq for some of its decisions. Fail
initialization if there are no cpufreq OPP tables available.

Change-Id: I5d64215d56f50d5df52c1433208b1eb40440c812
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-on: http://git-master/r/131437
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Peter Boonstoppel <pboonstoppel@nvidia.com>
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>

Rebase-Id: R03bb471218a088a816a67232861759cba2b91f38
This commit is contained in:
Peter De Schrijver
2012-09-11 17:27:51 +03:00
committed by Huang, Tao
parent 22a3f04881
commit 3f82668838
1 changed files with 6 additions and 0 deletions
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6
drivers/cpuquiet/governors/balanced.c
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@@ -511,8 +511,14 @@ static int balanced_start(void)
down_delay = msecs_to_jiffies(2000);
table = cpufreq_frequency_get_table(0);
if (!table)
return -EINVAL;
for (count = 0; table[count].frequency != CPUFREQ_TABLE_END; count++);
if (count < 4)
return -EINVAL;
idle_top_freq = table[(count / 2) - 1].frequency;
idle_bottom_freq = table[(count / 2) - 2].frequency;