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,