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authorViresh Kumar <viresh.kumar@linaro.org>2013-06-19 14:23:03 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-06-24 13:26:39 +0200
commitf77f146599146ddc19e0454170c06ddff75bc81f (patch)
tree03345ccb5a0dbad15bfa1e1ad641ea9f342f519d /drivers/cpufreq
parent567f4f6727bccf729fb2c55c9da29c787bb1b583 (diff)
cpufreq: pcc: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both should be called or both shouldn't be. In case we have started PRECHANGE notifier and found an error, we must call POSTCHANGE notifier with freqs.new = freqs.old to guarantee that the sequence of calling notifiers is complete. This patch fixes it. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/pcc-cpufreq.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c
index 0de00081a81e..1581fcc4cf4a 100644
--- a/drivers/cpufreq/pcc-cpufreq.c
+++ b/drivers/cpufreq/pcc-cpufreq.c
@@ -243,6 +243,8 @@ static int pcc_cpufreq_target(struct cpufreq_policy *policy,
return 0;
cmd_incomplete:
+ freqs.new = freqs.old;
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
iowrite16(0, &pcch_hdr->status);
spin_unlock(&pcc_lock);
return -EINVAL;