evie/android_kernel_oneplus_msm8998
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Merge "coresight-etm4x: separate cpu dying notifier"

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Linux Build Service Account 2016-08-18 12:04:27 -07:00 • committed by Gerrit - the friendly Code Review server
commit f6816043ee
1 changed files with 38 additions and 11 deletions
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49
drivers/hwtracing/coresight/coresight-etm4x.c
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@ -42,6 +42,7 @@ module_param_named(boot_enable, boot_enable, int, S_IRUGO);
static int etm4_count;
static struct etmv4_drvdata *etmdrvdata[NR_CPUS];
static struct notifier_block etm4_cpu_notifier;
static struct notifier_block etm4_cpu_dying_notifier;
static void etm4_os_unlock(void *info)
{
@ -2682,20 +2683,15 @@ static int etm4_cpu_callback(struct notifier_block *nfb, unsigned long action,
clk_disable[cpu] = false;
}
break;
case CPU_DYING:
spin_lock(&etmdrvdata[cpu]->spinlock);
if (etmdrvdata[cpu]->enable)
etm4_disable_hw(etmdrvdata[cpu]);
spin_unlock(&etmdrvdata[cpu]->spinlock);
break;
}
out:
return NOTIFY_OK;
err_init:
if (--etm4_count == 0)
if (--etm4_count == 0) {
unregister_hotcpu_notifier(&etm4_cpu_notifier);
unregister_hotcpu_notifier(&etm4_cpu_dying_notifier);
}
if (clk_disable[cpu]) {
pm_runtime_put(etmdrvdata[cpu]->dev);
@ -2715,6 +2711,31 @@ static struct notifier_block etm4_cpu_notifier = {
.notifier_call = etm4_cpu_callback,
};
static int etm4_cpu_dying_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
if (!etmdrvdata[cpu])
goto out;
switch (action & (~CPU_TASKS_FROZEN)) {
case CPU_DYING:
spin_lock(&etmdrvdata[cpu]->spinlock);
if (etmdrvdata[cpu]->enable)
etm4_disable_hw(etmdrvdata[cpu]);
spin_unlock(&etmdrvdata[cpu]->spinlock);
break;
}
out:
return NOTIFY_OK;
}
static struct notifier_block etm4_cpu_dying_notifier = {
.notifier_call = etm4_cpu_dying_callback,
.priority = 1,
};
static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
{
int ret;
@ -2773,8 +2794,10 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
etmdrvdata[drvdata->cpu] = drvdata;
if (!etm4_count++)
if (!etm4_count++) {
register_hotcpu_notifier(&etm4_cpu_notifier);
register_hotcpu_notifier(&etm4_cpu_dying_notifier);
}
put_online_cpus();
@ -2793,8 +2816,10 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
return 0;
err_late_init:
if (--etm4_count == 0)
if (--etm4_count == 0) {
unregister_hotcpu_notifier(&etm4_cpu_notifier);
unregister_hotcpu_notifier(&etm4_cpu_dying_notifier);
}
return ret;
}
@ -2803,8 +2828,10 @@ static int etm4_remove(struct amba_device *adev)
struct etmv4_drvdata *drvdata = amba_get_drvdata(adev);
coresight_unregister(drvdata->csdev);
if (--etm4_count == 0)
if (--etm4_count == 0) {
unregister_hotcpu_notifier(&etm4_cpu_notifier);
unregister_hotcpu_notifier(&etm4_cpu_dying_notifier);
}
return 0;
}