From e5ecc8719212e2566440818491ec5741689f3743 Mon Sep 17 00:00:00 2001 From: Christian Krafft Date: Fri, 20 Jul 2007 21:39:20 +0200 Subject: [PATCH] [CELL] cbe_cpufreq: fix initialization This patch fixes the initialization of the cbe_cpufreq driver. The code that initializes the PMI related functions was called per cpu: * registering cpufreq notifier block * registering a pmi handler This ends in a bug that the notifier block gets called in an endless loop. The initialization code is being put to the module init code path by this patch. This way it only gets called once. Signed-off-by: Christian Krafft Signed-off-by: Arnd Bergmann --- arch/powerpc/platforms/cell/cbe_cpufreq.c | 20 ++++++++------------ 1 file changed, 8 insertions(+), 12 deletions(-) diff --git a/arch/powerpc/platforms/cell/cbe_cpufreq.c b/arch/powerpc/platforms/cell/cbe_cpufreq.c index 5820fb9a45..3a26b3c115 100644 --- a/arch/powerpc/platforms/cell/cbe_cpufreq.c +++ b/arch/powerpc/platforms/cell/cbe_cpufreq.c @@ -196,10 +196,9 @@ static int pmi_notifier(struct notifier_block *nb, { struct cpufreq_policy *policy = data; - if (event != CPUFREQ_INCOMPATIBLE) - return 0; + if (pmi_frequency_limit) + cpufreq_verify_within_limits(policy, 0, pmi_frequency_limit); - cpufreq_verify_within_limits(policy, 0, pmi_frequency_limit); return 0; } @@ -263,11 +262,6 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy) cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu); - if (cbe_cpufreq_has_pmi) { - /* frequency might get limited later, initialize limit with max_freq */ - pmi_frequency_limit = max_freq; - cpufreq_register_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER); - } /* this ensures that policy->cpuinfo_min and policy->cpuinfo_max are set correctly */ return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs); @@ -275,9 +269,6 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy) static int cbe_cpufreq_cpu_exit(struct cpufreq_policy *policy) { - if (cbe_cpufreq_has_pmi) - cpufreq_unregister_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER); - cpufreq_frequency_table_put_attr(policy->cpu); return 0; } @@ -341,6 +332,9 @@ static int __init cbe_cpufreq_init(void) cbe_cpufreq_has_pmi = pmi_register_handler(&cbe_pmi_handler) == 0; + if (cbe_cpufreq_has_pmi) + cpufreq_register_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER); + return cpufreq_register_driver(&cbe_cpufreq_driver); } @@ -348,8 +342,10 @@ static void __exit cbe_cpufreq_exit(void) { cpufreq_unregister_driver(&cbe_cpufreq_driver); - if (cbe_cpufreq_has_pmi) + if (cbe_cpufreq_has_pmi) { + cpufreq_unregister_notifier(&pmi_notifier_block, CPUFREQ_POLICY_NOTIFIER); pmi_unregister_handler(&cbe_pmi_handler); + } } module_init(cbe_cpufreq_init); -- 2.20.1