diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 56c2101e80ad..998f7fc0e920 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -450,7 +450,7 @@ static size_t mei_me_hbuf_max_len(const struct mei_device *dev)
 
 
 /**
- * mei_me_write_message - writes a message to mei device.
+ * mei_me_hbuf_write - writes a message to host hw buffer.
  *
  * @dev: the device structure
  * @header: mei HECI header of message
@@ -458,9 +458,9 @@ static size_t mei_me_hbuf_max_len(const struct mei_device *dev)
  *
  * Return: -EIO if write has failed
  */
-static int mei_me_write_message(struct mei_device *dev,
-			struct mei_msg_hdr *header,
-			unsigned char *buf)
+static int mei_me_hbuf_write(struct mei_device *dev,
+			     struct mei_msg_hdr *header,
+			     const unsigned char *buf)
 {
 	unsigned long rem;
 	unsigned long length = header->length;
@@ -1243,7 +1243,7 @@ static const struct mei_hw_ops mei_me_hw_ops = {
 	.hbuf_is_ready = mei_me_hbuf_is_empty,
 	.hbuf_max_len = mei_me_hbuf_max_len,
 
-	.write = mei_me_write_message,
+	.write = mei_me_hbuf_write,
 
 	.rdbuf_full_slots = mei_me_count_full_read_slots,
 	.read_hdr = mei_me_mecbrw_read,
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 60415a2bfcbd..b7a2f622f23c 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -691,7 +691,8 @@ static void mei_txe_hw_config(struct mei_device *dev)
  */
 
 static int mei_txe_write(struct mei_device *dev,
-		struct mei_msg_hdr *header, unsigned char *buf)
+			 struct mei_msg_hdr *header,
+			 const unsigned char *buf)
 {
 	struct mei_txe_hw *hw = to_txe_hw(dev);
 	unsigned long rem;
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index d50f70b4a05e..93b150315b93 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -300,10 +300,9 @@ struct mei_hw_ops {
 	int (*hbuf_free_slots)(struct mei_device *dev);
 	bool (*hbuf_is_ready)(struct mei_device *dev);
 	size_t (*hbuf_max_len)(const struct mei_device *dev);
-
 	int (*write)(struct mei_device *dev,
 		     struct mei_msg_hdr *hdr,
-		     unsigned char *buf);
+		     const unsigned char *buf);
 
 	int (*rdbuf_full_slots)(struct mei_device *dev);
 
@@ -665,7 +664,7 @@ static inline size_t mei_hbuf_max_len(const struct mei_device *dev)
 }
 
 static inline int mei_write_message(struct mei_device *dev,
-			struct mei_msg_hdr *hdr, void *buf)
+				    struct mei_msg_hdr *hdr, const void *buf)
 {
 	return dev->ops->write(dev, hdr, buf);
 }