diff options
Diffstat (limited to 'drivers/hwmon/coretemp.c')
| -rw-r--r-- | drivers/hwmon/coretemp.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 6a27eb2fed17..3ae16c37bd92 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -51,6 +51,7 @@ static int force_tjmax; module_param_named(tjmax, force_tjmax, int, 0444); MODULE_PARM_DESC(tjmax, "TjMax value in degrees Celsius"); +#define PKG_SYSFS_ATTR_NO 1 /* Sysfs attribute for package temp */ #define BASE_SYSFS_ATTR_NO 2 /* Sysfs Base attr no for coretemp */ #define NUM_REAL_CORES 128 /* Number of Real cores per cpu */ #define CORETEMP_NAME_LENGTH 19 /* String Length of attrs */ @@ -138,7 +139,9 @@ static ssize_t show_crit_alarm(struct device *dev, struct platform_data *pdata = dev_get_drvdata(dev); struct temp_data *tdata = pdata->core_data[attr->index]; + mutex_lock(&tdata->update_lock); rdmsr_on_cpu(tdata->cpu, tdata->status_reg, &eax, &edx); + mutex_unlock(&tdata->update_lock); return sprintf(buf, "%d\n", (eax >> 5) & 1); } @@ -483,7 +486,7 @@ static int create_core_data(struct platform_device *pdev, unsigned int cpu, * The attr number is always core id + 2 * The Pkgtemp will always show up as temp1_*, if available */ - attr_no = pkg_flag ? 1 : TO_ATTR_NO(cpu); + attr_no = pkg_flag ? PKG_SYSFS_ATTR_NO : TO_ATTR_NO(cpu); if (attr_no > MAX_CORE_DATA - 1) return -ERANGE; @@ -662,7 +665,7 @@ static void coretemp_device_remove(unsigned int cpu) mutex_unlock(&pdev_list_mutex); } -static bool is_any_core_online(struct platform_data *pdata) +static int get_online_core_in_package(struct platform_data *pdata) { int i; @@ -670,10 +673,10 @@ static bool is_any_core_online(struct platform_data *pdata) for (i = MAX_CORE_DATA - 1; i >= 0; --i) { if (pdata->core_data[i] && !pdata->core_data[i]->is_pkg_data) { - return true; + return pdata->core_data[i]->cpu; } } - return false; + return nr_cpu_ids; } static void get_core_online(unsigned int cpu) @@ -720,9 +723,10 @@ static void get_core_online(unsigned int cpu) static void put_core_offline(unsigned int cpu) { - int i, indx; - struct platform_data *pdata; struct platform_device *pdev = coretemp_get_pdev(cpu); + struct platform_data *pdata; + struct temp_data *tdata; + int i, indx, target; /* If the physical CPU device does not exist, just return */ if (!pdev) @@ -762,8 +766,21 @@ static void put_core_offline(unsigned int cpu) * which in turn calls coretemp_remove. This removes the * pkgtemp entry and does other clean ups. */ - if (!is_any_core_online(pdata)) + target = get_online_core_in_package(pdata); + if (target >= nr_cpu_ids) { coretemp_device_remove(cpu); + return; + } + /* + * Check whether this core is the target for the package + * interface. We need to assign it to some other cpu. + */ + tdata = pdata->core_data[PKG_SYSFS_ATTR_NO]; + if (tdata && tdata->cpu == cpu) { + mutex_lock(&tdata->update_lock); + tdata->cpu = target; + mutex_unlock(&tdata->update_lock); + } } static int coretemp_cpu_callback(struct notifier_block *nfb, |