diff options
Diffstat (limited to 'drivers/rtc/rtc-pcf8563.c')
| -rw-r--r-- | drivers/rtc/rtc-pcf8563.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c index 7fc43950cf6c..b282c6b07969 100644 --- a/drivers/rtc/rtc-pcf8563.c +++ b/drivers/rtc/rtc-pcf8563.c @@ -277,20 +277,16 @@ static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm) static int pcf8563_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) { struct i2c_client *client = to_i2c_client(dev); - int vl, ret; + int ret; switch (cmd) { case RTC_VL_READ: - ret = i2c_smbus_read_byte_data(client, PCF8563_REG_SC); if (ret < 0) return ret; - vl = ret & PCF8563_SC_LV ? 1 : 0; - - if (copy_to_user((void __user *)arg, &vl, sizeof(int))) - return -EFAULT; - return 0; + return put_user(ret & PCF8563_SC_LV ? RTC_VL_DATA_INVALID : 0, + (unsigned int __user *)arg); default: return -ENOIOCTLCMD; } |