From 6cd1bba85417c75ddab35111c5220ba0c59da86e Mon Sep 17 00:00:00 2001
From: Marc-Antoine Ruel <maruel@chromium.org>
Date: Sun, 19 May 2019 09:29:16 -0400
Subject: [PATCH] travis: start using ineffassign

It actually found two bugs.
---
 devices/lirc/lirc.go                    | 3 +++
 experimental/devices/mfrc522/mfrc522.go | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/devices/lirc/lirc.go b/devices/lirc/lirc.go
index dc6dfa0..753915f 100644
--- a/devices/lirc/lirc.go
+++ b/devices/lirc/lirc.go
@@ -131,6 +131,9 @@ func (c *Conn) readData(r *bufio.Reader) error {
 	switch cmd {
 	case "SIGHUP":
 		_, err = c.w.Write([]byte("LIST\n"))
+		if err != nil {
+			return err
+		}
 	default:
 		// In case of any error, ignore the rest.
 		line, err := read(r)
diff --git a/experimental/devices/mfrc522/mfrc522.go b/experimental/devices/mfrc522/mfrc522.go
index 59f6b53..de9e32d 100644
--- a/experimental/devices/mfrc522/mfrc522.go
+++ b/experimental/devices/mfrc522/mfrc522.go
@@ -384,7 +384,7 @@ func (r *Dev) write(blockAddr byte, data []byte) error {
 	if backLen != 4 || read[0]&0x0F != 0x0A {
 		err = wrapf("can't write data")
 	}
-	return nil
+	return err
 }
 
 // preAccess  calculates CRC of the block address to be accessed and sends it to the device for verification.