diff --git a/src/eeprom.rs b/src/eeprom.rs
index 70cb3cf..ce2efc4 100644
--- a/src/eeprom.rs
+++ b/src/eeprom.rs
@@ -3,7 +3,7 @@ use super::i2c;
 
 const I2C_ADDR: u8 = 0xa0;
 
-pub fn read_eui48<'a>(i2c: &pac::I2C2) -> Result<[u8; 6], i2c::Error> {
+pub fn read_eui48(i2c: &pac::I2C2) -> Result<[u8; 6], i2c::Error> {
     let mut buffer = [0u8; 6];
     i2c::write_read(i2c, I2C_ADDR, &[0xFAu8], &mut buffer)?;
     Ok(buffer)
diff --git a/src/i2c.rs b/src/i2c.rs
index 05989c9..5b3a17b 100644
--- a/src/i2c.rs
+++ b/src/i2c.rs
@@ -101,7 +101,7 @@ fn poll_for_start_ack(
         }
     }
 
-    return Err(Error::Timeout);
+    Err(Error::Timeout)
 }
 
 
@@ -111,10 +111,10 @@ pub fn write_read(
     bytes: &[u8],
     buffer: &mut [u8],
 ) -> Result<(), Error> {
-    assert!(bytes.len() < 256 && bytes.len() > 0);
-    assert!(buffer.len() < 256 && buffer.len() > 0);
+    assert!(bytes.len() < 256 && !bytes.is_empty());
+    assert!(buffer.len() < 256 && !buffer.is_empty());
 
-    poll_for_start_ack(i2c, addr|0, false, bytes.len(), false, true)?;
+    poll_for_start_ack(i2c, addr, false, bytes.len(), false, true)?;
 
     for byte in bytes {
         // Wait until we are allowed to send data (START has been ACKed or last