1 files changed, 14 insertions, 9 deletions

diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index b1e3e6179e56..2011567005f9 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -58,7 +58,7 @@ rtc_dev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
         unsigned long data;
         ssize_t ret;
 
-        if (count < sizeof(unsigned long))
+        if (count != sizeof(unsigned int) && count < sizeof(unsigned long))
                 return -EINVAL;
 
         add_wait_queue(&rtc->irq_queue, &wait);
@@ -90,11 +90,16 @@ rtc_dev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
         if (ret == 0) {
                 /* Check for any data updates */
                 if (rtc->ops->read_callback)
-                        data = rtc->ops->read_callback(rtc->class_dev.dev, data);
-
-                ret = put_user(data, (unsigned long __user *)buf);
-                if (ret == 0)
-                        ret = sizeof(unsigned long);
+                        data = rtc->ops->read_callback(rtc->class_dev.dev,
+                                                       data);
+
+                if (sizeof(int) != sizeof(long) &&
+                    count == sizeof(unsigned int))
+                        ret = put_user(data, (unsigned int __user *)buf) ?:
+                                sizeof(unsigned int);
+                else
+                        ret = put_user(data, (unsigned long __user *)buf) ?:
+                                sizeof(unsigned long);
         }
         return ret;
 }
@@ -136,13 +141,13 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
         /* try the driver's ioctl interface */
         if (ops->ioctl) {
                 err = ops->ioctl(class_dev->dev, cmd, arg);
-                if (err != -EINVAL)
+                if (err != -ENOIOCTLCMD)
                         return err;
         }
 
         /* if the driver does not provide the ioctl interface
          * or if that particular ioctl was not implemented
-         * (-EINVAL), we will try to emulate here.
+         * (-ENOIOCTLCMD), we will try to emulate here.
          */
 
         switch (cmd) {
@@ -228,7 +233,7 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file,
                 break;
 
         default:
-                err = -EINVAL;
+                err = -ENOTTY;
                 break;
         }