diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 4851ed2..83e30c6 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -44,6 +44,24 @@
 }
 EXPORT_SYMBOL(cros_ec_prepare_tx);
 
+int cros_ec_check_result(struct cros_ec_device *ec_dev,
+			 struct cros_ec_command *msg)
+{
+	switch (msg->result) {
+	case EC_RES_SUCCESS:
+		return 0;
+	case EC_RES_IN_PROGRESS:
+		dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
+			msg->command);
+		return -EAGAIN;
+	default:
+		dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",
+			msg->command, msg->result);
+		return 0;
+	}
+}
+EXPORT_SYMBOL(cros_ec_check_result);
+
 static irqreturn_t ec_irq_thread(int irq, void *data)
 {
 	struct cros_ec_device *ec_dev = data;
diff --git a/drivers/mfd/cros_ec_i2c.c b/drivers/mfd/cros_ec_i2c.c
index 5bb32f55..189e7d1 100644
--- a/drivers/mfd/cros_ec_i2c.c
+++ b/drivers/mfd/cros_ec_i2c.c
@@ -92,12 +92,10 @@
 	}
 
 	/* check response error code */
-	if (i2c_msg[1].buf[0]) {
-		dev_warn(ec_dev->dev, "command 0x%02x returned an error %d\n",
-			 msg->command, i2c_msg[1].buf[0]);
-		ret = -EINVAL;
+	msg->result = i2c_msg[1].buf[0];
+	ret = cros_ec_check_result(ec_dev, msg);
+	if (ret)
 		goto done;
-	}
 
 	/* copy response packet payload and compute checksum */
 	sum = in_buf[0] + in_buf[1];
diff --git a/drivers/mfd/cros_ec_spi.c b/drivers/mfd/cros_ec_spi.c
index 6e929b5..da1da05 100644
--- a/drivers/mfd/cros_ec_spi.c
+++ b/drivers/mfd/cros_ec_spi.c
@@ -285,21 +285,14 @@
 		goto exit;
 	}
 
-	/* check response error code */
 	ptr = ec_dev->din;
-	if (ptr[0]) {
-		if (ptr[0] == EC_RES_IN_PROGRESS) {
-			dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
-				ec_msg->command);
-			ret = -EAGAIN;
-			goto exit;
-		}
-		dev_warn(ec_dev->dev, "command 0x%02x returned an error %d\n",
-			 ec_msg->command, ptr[0]);
-		debug_packet(ec_dev->dev, "in_err", ptr, len);
-		ret = -EINVAL;
+
+	/* check response error code */
+	ec_msg->result = ptr[0];
+	ret = cros_ec_check_result(ec_dev, ec_msg);
+	if (ret)
 		goto exit;
-	}
+
 	len = ptr[1];
 	sum = ptr[0] + ptr[1];
 	if (len > ec_msg->insize) {