1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index f8a0aab218cb..9b742d3ffb94 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -11,6 +11,8 @@
  * published by the Free Software Foundation.
 */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/rtc.h>
 #include <linux/kdev_t.h>
@@ -50,6 +52,10 @@ static int rtc_suspend(struct device *dev, pm_message_t mesg)
         struct rtc_device       *rtc = to_rtc_device(dev);
         struct rtc_time         tm;
         struct timespec         delta, delta_delta;
+
+        if (has_persistent_clock())
+                return 0;
+
         if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0)
                 return 0;
 
@@ -88,6 +94,9 @@ static int rtc_resume(struct device *dev)
         struct timespec         new_system, new_rtc;
         struct timespec         sleep_time;
 
+        if (has_persistent_clock())
+                return 0;
+
         rtc_hctosys_ret = -ENODEV;
         if (strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE) != 0)
                 return 0;
@@ -244,7 +253,6 @@ void rtc_device_unregister(struct rtc_device *rtc)
                 rtc_proc_del_device(rtc);
                 device_unregister(&rtc->dev);
                 rtc->ops = NULL;
-                ida_simple_remove(&rtc_ida, rtc->id);
                 mutex_unlock(&rtc->ops_lock);
                 put_device(&rtc->dev);
         }
@@ -255,7 +263,7 @@ static int __init rtc_init(void)
 {
         rtc_class = class_create(THIS_MODULE, "rtc");
         if (IS_ERR(rtc_class)) {
-                printk(KERN_ERR "%s: couldn't create class\n", __FILE__);
+                pr_err("couldn't create class\n");
                 return PTR_ERR(rtc_class);
         }
         rtc_class->suspend = rtc_suspend;