hwmon: (coretemp) Fixup platform device ID change

With recent change "hwmon: (coretemp) don't use kernel assigned CPU
number as platform device ID", the microcode check is now running on
random CPU. Fix that by checking the microcode before creating the
platform device rather than at probe time.

Also avoid calling TO_PHYS_ID(cpu) twice in the same function, it's
expensive.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

drivers/hwmon/coretemp.c

@@ -377,9 +377,9 @@ static int create_core_attrs(struct temp_data *tdata, struct device *dev,
 }
 
 
-static int __devinit chk_ucode_version(struct platform_device *pdev)
+static int __cpuinit chk_ucode_version(unsigned int cpu)
 {
-	struct cpuinfo_x86 *c = &cpu_data(pdev->id);
+	struct cpuinfo_x86 *c = &cpu_data(cpu);
 	int err;
 	u32 edx;
 
@@ -390,16 +390,14 @@ static int __devinit chk_ucode_version(struct platform_device *pdev)
 	 */
 	if (c->x86_model == 0xe && c->x86_mask < 0xc) {
 		/* check for microcode update */
-		err = smp_call_function_single(pdev->id, get_ucode_rev_on_cpu,
+		err = smp_call_function_single(cpu, get_ucode_rev_on_cpu,
 					       &edx, 1);
 		if (err) {
-			dev_err(&pdev->dev,
-				"Cannot determine microcode revision of "
-				"CPU#%u (%d)!\n", pdev->id, err);
+			pr_err("Cannot determine microcode revision of "
+			       "CPU#%u (%d)!\n", cpu, err);
 			return -ENODEV;
 		} else if (edx < 0x39) {
-			dev_err(&pdev->dev,
-				"Errata AE18 not fixed, update BIOS or "
+			pr_err("Errata AE18 not fixed, update BIOS or "
 			       "microcode of the CPU!\n");
 			return -ENODEV;
 		}
@@ -544,11 +542,6 @@ static int __devinit coretemp_probe(struct platform_device *pdev)
 	struct platform_data *pdata;
 	int err;
 
-	/* Check the microcode version of the CPU */
-	err = chk_ucode_version(pdev);
-	if (err)
-		return err;
-
 	/* Initialize the per-package data structures */
 	pdata = kzalloc(sizeof(struct platform_data), GFP_KERNEL);
 	if (!pdata)
@@ -630,7 +623,7 @@ static int __cpuinit coretemp_device_add(unsigned int cpu)
 	}
 
 	pdev_entry->pdev = pdev;
-	pdev_entry->phys_proc_id = TO_PHYS_ID(cpu);
+	pdev_entry->phys_proc_id = pdev->id;
 
 	list_add_tail(&pdev_entry->list, &pdev_list);
 	mutex_unlock(&pdev_list_mutex);
@@ -691,6 +684,10 @@ static void __cpuinit get_core_online(unsigned int cpu)
 		return;
 
 	if (!pdev) {
+		/* Check the microcode version of the CPU */
+		if (chk_ucode_version(cpu))
+			return;
+
 		/*
 		 * Alright, we have DTS support.
 		 * We are bringing the _first_ core in this pkg