diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/power/opp.c | 31 | ||||
| -rw-r--r-- | drivers/pnp/resource.c | 4 | ||||
| -rw-r--r-- | drivers/powercap/intel_rapl.c | 33 |
3 files changed, 40 insertions, 28 deletions
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 2553867..39412c1 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -394,6 +394,13 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor); * to keep the integrity of the internal data structures. Callers should ensure * that this function is *NOT* called under RCU protection or in contexts where * mutex cannot be locked. + * + * Return: + * 0: On success OR + * Duplicate OPPs (both freq and volt are same) and opp->available + * -EEXIST: Freq are same and volt are different OR + * Duplicate OPPs (both freq and volt are same) and !opp->available + * -ENOMEM: Memory allocation failure */ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) { @@ -443,15 +450,31 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) new_opp->u_volt = u_volt; new_opp->available = true; - /* Insert new OPP in order of increasing frequency */ + /* + * Insert new OPP in order of increasing frequency + * and discard if already present + */ head = &dev_opp->opp_list; list_for_each_entry_rcu(opp, &dev_opp->opp_list, node) { - if (new_opp->rate < opp->rate) + if (new_opp->rate <= opp->rate) break; else head = &opp->node; } + /* Duplicate OPPs ? */ + if (new_opp->rate == opp->rate) { + int ret = opp->available && new_opp->u_volt == opp->u_volt ? + 0 : -EEXIST; + + dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n", + __func__, opp->rate, opp->u_volt, opp->available, + new_opp->rate, new_opp->u_volt, new_opp->available); + mutex_unlock(&dev_opp_list_lock); + kfree(new_opp); + return ret; + } + list_add_rcu(&new_opp->node, head); mutex_unlock(&dev_opp_list_lock); @@ -734,11 +757,9 @@ int of_init_opp_table(struct device *dev) unsigned long freq = be32_to_cpup(val++) * 1000; unsigned long volt = be32_to_cpup(val++); - if (dev_pm_opp_add(dev, freq, volt)) { + if (dev_pm_opp_add(dev, freq, volt)) dev_warn(dev, "%s: Failed to add OPP %ld\n", __func__, freq); - continue; - } nr -= 2; } diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c index 01712cb..782e822 100644 --- a/drivers/pnp/resource.c +++ b/drivers/pnp/resource.c @@ -360,7 +360,7 @@ int pnp_check_irq(struct pnp_dev *dev, struct resource *res) return 1; /* check if the resource is valid */ - if (*irq < 0 || *irq > 15) + if (*irq > 15) return 0; /* check if the resource is reserved */ @@ -424,7 +424,7 @@ int pnp_check_dma(struct pnp_dev *dev, struct resource *res) return 1; /* check if the resource is valid */ - if (*dma < 0 || *dma == 4 || *dma > 7) + if (*dma == 4 || *dma > 7) return 0; /* check if the resource is reserved */ diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c index d9a0770..b1cda6f 100644 --- a/drivers/powercap/intel_rapl.c +++ b/drivers/powercap/intel_rapl.c @@ -951,7 +951,9 @@ static const struct x86_cpu_id rapl_ids[] = { { X86_VENDOR_INTEL, 6, 0x2d},/* Sandy Bridge EP */ { X86_VENDOR_INTEL, 6, 0x37},/* Valleyview */ { X86_VENDOR_INTEL, 6, 0x3a},/* Ivy Bridge */ - { X86_VENDOR_INTEL, 6, 0x45},/* Haswell */ + { X86_VENDOR_INTEL, 6, 0x3c},/* Haswell */ + { X86_VENDOR_INTEL, 6, 0x3d},/* Broadwell */ + { X86_VENDOR_INTEL, 6, 0x45},/* Haswell ULT */ /* TODO: Add more CPU IDs after testing */ {} }; @@ -1124,8 +1126,7 @@ err_cleanup_package: static int rapl_check_domain(int cpu, int domain) { unsigned msr; - u64 val1, val2 = 0; - int retry = 0; + u64 val = 0; switch (domain) { case RAPL_DOMAIN_PACKAGE: @@ -1144,26 +1145,13 @@ static int rapl_check_domain(int cpu, int domain) pr_err("invalid domain id %d\n", domain); return -EINVAL; } - if (rdmsrl_safe_on_cpu(cpu, msr, &val1)) - return -ENODEV; - - /* PP1/uncore/graphics domain may not be active at the time of - * driver loading. So skip further checks. + /* make sure domain counters are available and contains non-zero + * values, otherwise skip it. */ - if (domain == RAPL_DOMAIN_PP1) - return 0; - /* energy counters roll slowly on some domains */ - while (++retry < 10) { - usleep_range(10000, 15000); - rdmsrl_safe_on_cpu(cpu, msr, &val2); - if ((val1 & ENERGY_STATUS_MASK) != (val2 & ENERGY_STATUS_MASK)) - return 0; - } - /* if energy counter does not change, report as bad domain */ - pr_info("domain %s energy ctr %llu:%llu not working, skip\n", - rapl_domain_names[domain], val1, val2); + if (rdmsrl_safe_on_cpu(cpu, msr, &val) || !val) + return -ENODEV; - return -ENODEV; + return 0; } /* Detect active and valid domains for the given CPU, caller must @@ -1180,6 +1168,9 @@ static int rapl_detect_domains(struct rapl_package *rp, int cpu) /* use physical package id to read counters */ if (!rapl_check_domain(cpu, i)) rp->domain_map |= 1 << i; + else + pr_warn("RAPL domain %s detection failed\n", + rapl_domain_names[i]); } rp->nr_domains = bitmap_weight(&rp->domain_map, RAPL_DOMAIN_MAX); if (!rp->nr_domains) { |
