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Power management fixes for 5.3-rc2

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- Initialize the power capping subsystem and the RAPL driver earlier
    in case the int340X thermal driver is built-in and attempts to
    register an MMIO interface for RAPL which must not happen before
    the requisite infrastructure is ready (Zhang Rui).
 
  - Fix the int340X thermal driver's RAPL MMIO interface registration
    error path (Rafael Wysocki).
 
  - Fix possible use-after-free in the pasemi cpufreq driver (Wen Yang).
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Merge tag 'pm-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki
 "These fix two issues related to the RAPL MMIO interface support added
  recently and one cpufreq driver issue.

  Specifics:

   - Initialize the power capping subsystem and the RAPL driver earlier
     in case the int340X thermal driver is built-in and attempts to
     register an MMIO interface for RAPL which must not happen before
     the requisite infrastructure is ready (Zhang Rui)

   - Fix the int340X thermal driver's RAPL MMIO interface registration
     error path (Rafael Wysocki)

   - Fix possible use-after-free in the pasemi cpufreq driver (Wen
     Yang)"

* tag 'pm-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq/pasemi: fix use-after-free in pas_cpufreq_cpu_init()
  int340X/processor_thermal_device: Fix proc_thermal_rapl_remove()
  powercap: Invoke powercap_init() and rapl_init() earlier
This commit is contained in:
Linus Torvalds 2019-07-25 09:07:32 -07:00
commit 6789f873ed
4 changed files with 16 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/cpufreq/pasemi-cpufreq.c
View File

@ -131,11 +131,19 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
int err = -ENODEV;
cpu = of_get_cpu_node(policy->cpu, NULL);
of_node_put(cpu);
if (!cpu)
goto out;
max_freqp = of_get_property(cpu, "clock-frequency", NULL);
of_node_put(cpu);
if (!max_freqp) {
err = -EINVAL;
goto out;
}
/* we need the freq in kHz */
max_freq = *max_freqp / 1000;
dn = of_find_compatible_node(NULL, NULL, "1682m-sdc");
if (!dn)
dn = of_find_compatible_node(NULL, NULL,
@ -171,16 +179,6 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
}
pr_debug("init cpufreq on CPU %d\n", policy->cpu);
max_freqp = of_get_property(cpu, "clock-frequency", NULL);
if (!max_freqp) {
err = -EINVAL;
goto out_unmap_sdcpwr;
}
/* we need the freq in kHz */
max_freq = *max_freqp / 1000;
pr_debug("max clock-frequency is at %u kHz\n", max_freq);
pr_debug("initializing frequency table\n");
@ -199,9 +197,6 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency());
return 0;
out_unmap_sdcpwr:
iounmap(sdcpwr_mapbase);
out_unmap_sdcasr:
iounmap(sdcasr_mapbase);
out:

2
drivers/powercap/intel_rapl_common.c
View File

@ -1454,7 +1454,7 @@ static void __exit rapl_exit(void)
unregister_pm_notifier(&rapl_pm_notifier);
}
module_init(rapl_init);
fs_initcall(rapl_init);
module_exit(rapl_exit);
MODULE_DESCRIPTION("Intel Runtime Average Power Limit (RAPL) common code");

2
drivers/powercap/powercap_sys.c
View File

@ -671,7 +671,7 @@ static int __init powercap_init(void)
return class_register(&powercap_class);
}
device_initcall(powercap_init);
fs_initcall(powercap_init);
MODULE_DESCRIPTION("PowerCap sysfs Driver");
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");

4
drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
View File

@ -487,6 +487,7 @@ static int proc_thermal_rapl_add(struct pci_dev *pdev,
rapl_mmio_cpu_online, rapl_mmio_cpu_down_prep);
if (ret < 0) {
powercap_unregister_control_type(rapl_mmio_priv.control_type);
rapl_mmio_priv.control_type = NULL;
return ret;
}
rapl_mmio_priv.pcap_rapl_online = ret;
@ -496,6 +497,9 @@ static int proc_thermal_rapl_add(struct pci_dev *pdev,
static void proc_thermal_rapl_remove(void)
{
if (IS_ERR_OR_NULL(rapl_mmio_priv.control_type))
return;
cpuhp_remove_state(rapl_mmio_priv.pcap_rapl_online);
powercap_unregister_control_type(rapl_mmio_priv.control_type);
}