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path: root/drivers/rtc/rtc-dev.c
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Diffstat (limited to 'drivers/rtc/rtc-dev.c')
-rw-r--r--drivers/rtc/rtc-dev.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index b1e3e6179e5..6c9ad92747f 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;
}