diff options
| author | Tony Lindgren <tony@atomide.com> | 2011-03-10 18:54:14 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-03-10 18:54:14 -0800 |
| commit | 94a06b74e724caabcf0464c81527cfbcae0c8aff (patch) | |
| tree | 3570b6a627382a5eb5c8328b4959f615544d8e62 /arch/x86/kernel/cpu/cpufreq/powernow-k8.c | |
| parent | 0dde52a9f5330eec240660191a94b51bd911ffcd (diff) | |
| parent | 9062511097683b4422f023d181b4a8b2db1a7a72 (diff) | |
Merge branch 'for_2.6.39/pm-misc' of ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus
Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/powernow-k8.c')
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/powernow-k8.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c index 35c7e65e59b..c567dec854f 100644 --- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c @@ -1537,6 +1537,7 @@ static struct notifier_block cpb_nb = { static int __cpuinit powernowk8_init(void) { unsigned int i, supported_cpus = 0, cpu; + int rv; for_each_online_cpu(i) { int rc; @@ -1555,14 +1556,14 @@ static int __cpuinit powernowk8_init(void) cpb_capable = true; - register_cpu_notifier(&cpb_nb); - msrs = msrs_alloc(); if (!msrs) { printk(KERN_ERR "%s: Error allocating msrs!\n", __func__); return -ENOMEM; } + register_cpu_notifier(&cpb_nb); + rdmsr_on_cpus(cpu_online_mask, MSR_K7_HWCR, msrs); for_each_cpu(cpu, cpu_online_mask) { @@ -1574,7 +1575,13 @@ static int __cpuinit powernowk8_init(void) (cpb_enabled ? "on" : "off")); } - return cpufreq_register_driver(&cpufreq_amd64_driver); + rv = cpufreq_register_driver(&cpufreq_amd64_driver); + if (rv < 0 && boot_cpu_has(X86_FEATURE_CPB)) { + unregister_cpu_notifier(&cpb_nb); + msrs_free(msrs); + msrs = NULL; + } + return rv; } /* driver entry point for term */ |