1 files changed, 6 insertions, 7 deletions

diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index c2ef0a22ee94..1a865c9f1127 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -118,22 +118,21 @@ static int pcf8563_write_block_data(struct i2c_client *client,
 
 static int pcf8563_set_alarm_mode(struct i2c_client *client, bool on)
 {
-        unsigned char buf[2];
+        unsigned char buf;
         int err;
 
-        err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, buf + 1);
+        err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, &buf);
         if (err < 0)
                 return err;
 
         if (on)
-                buf[1] |= PCF8563_BIT_AIE;
+                buf |= PCF8563_BIT_AIE;
         else
-                buf[1] &= ~PCF8563_BIT_AIE;
+                buf &= ~PCF8563_BIT_AIE;
 
-        buf[1] &= ~PCF8563_BIT_AF;
-        buf[0] = PCF8563_REG_ST2;
+        buf &= ~PCF8563_BIT_AF;
 
-        err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, buf + 1);
+        err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, &buf);
         if (err < 0) {
                 dev_err(&client->dev, "%s: write error\n", __func__);
                 return -EIO;