hwmon: (coretemp) Remove unnecessary dependency of array index

When sensor_device_attribute pointer is available, use container_of() to
get the temp_data address.

This removes the unnecessary dependency of cached index in
pdata->core_data[].

No functional change.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20240202092144.71180-6-rui.zhang@intel.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/coretemp.c

@@ -342,7 +342,7 @@ static ssize_t show_label(struct device *dev,
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct platform_data *pdata = dev_get_drvdata(dev);
-	struct temp_data *tdata = pdata->core_data[attr->index];
+	struct temp_data *tdata = container_of(attr, struct temp_data, sd_attrs[ATTR_LABEL]);
 
 	if (tdata->is_pkg_data)
 		return sprintf(buf, "Package id %u\n", pdata->pkg_id);
@@ -355,8 +355,7 @@ static ssize_t show_crit_alarm(struct device *dev,
 {
 	u32 eax, edx;
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct platform_data *pdata = dev_get_drvdata(dev);
-	struct temp_data *tdata = pdata->core_data[attr->index];
+	struct temp_data *tdata = container_of(attr, struct temp_data, sd_attrs[ATTR_CRIT_ALARM]);
 
 	mutex_lock(&tdata->update_lock);
 	rdmsr_on_cpu(tdata->cpu, tdata->status_reg, &eax, &edx);
@@ -369,8 +368,7 @@ static ssize_t show_tjmax(struct device *dev,
 			struct device_attribute *devattr, char *buf)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct platform_data *pdata = dev_get_drvdata(dev);
-	struct temp_data *tdata = pdata->core_data[attr->index];
+	struct temp_data *tdata = container_of(attr, struct temp_data, sd_attrs[ATTR_TJMAX]);
 	int tjmax;
 
 	mutex_lock(&tdata->update_lock);
@@ -384,8 +382,7 @@ static ssize_t show_ttarget(struct device *dev,
 				struct device_attribute *devattr, char *buf)
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct platform_data *pdata = dev_get_drvdata(dev);
-	struct temp_data *tdata = pdata->core_data[attr->index];
+	struct temp_data *tdata = container_of(attr, struct temp_data, sd_attrs[ATTR_TTARGET]);
 	int ttarget;
 
 	mutex_lock(&tdata->update_lock);
@@ -402,8 +399,7 @@ static ssize_t show_temp(struct device *dev,
 {
 	u32 eax, edx;
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct platform_data *pdata = dev_get_drvdata(dev);
-	struct temp_data *tdata = pdata->core_data[attr->index];
+	struct temp_data *tdata = container_of(attr, struct temp_data, sd_attrs[ATTR_TEMP]);
 	int tjmax;
 
 	mutex_lock(&tdata->update_lock);
@@ -426,8 +422,7 @@ static ssize_t show_temp(struct device *dev,
 	return sprintf(buf, "%d\n", tdata->temp);
 }
 
-static int create_core_attrs(struct temp_data *tdata, struct device *dev,
-			     int index)
+static int create_core_attrs(struct temp_data *tdata, struct device *dev)
 {
 	int i;
 	static ssize_t (*const rd_ptr[TOTAL_ATTRS]) (struct device *dev,
@@ -452,7 +447,6 @@ static int create_core_attrs(struct temp_data *tdata, struct device *dev,
 		tdata->sd_attrs[i].dev_attr.attr.name = tdata->attr_name[i];
 		tdata->sd_attrs[i].dev_attr.attr.mode = 0444;
 		tdata->sd_attrs[i].dev_attr.show = rd_ptr[i];
-		tdata->sd_attrs[i].index = index;
 		tdata->attrs[i] = &tdata->sd_attrs[i].dev_attr.attr;
 	}
 	tdata->attr_group.attrs = tdata->attrs;
@@ -557,7 +551,7 @@ static int create_core_data(struct platform_device *pdev, unsigned int cpu,
 	pdata->core_data[index] = tdata;
 
 	/* Create sysfs interfaces */
-	err = create_core_attrs(tdata, pdata->hwmon_dev, index);
+	err = create_core_attrs(tdata, pdata->hwmon_dev);
 	if (err)
 		goto exit_free;