diff --git a/drivers/staging/comedi/comedi_buf.c b/drivers/staging/comedi/comedi_buf.c
index 5aa86842fcce1..52a75d2238dcc 100644
--- a/drivers/staging/comedi/comedi_buf.c
+++ b/drivers/staging/comedi/comedi_buf.c
@@ -510,7 +510,18 @@ void comedi_buf_memcpy_from(struct comedi_subdevice *s, unsigned int offset,
 }
 EXPORT_SYMBOL_GPL(comedi_buf_memcpy_from);
 
-/* Writes an array of data points to comedi's buffer */
+/**
+ * comedi_write_array_to_buffer - write data to comedi buffer
+ * @s: comedi_subdevice struct
+ * @data: destination
+ * @num_bytes: number of bytes to write
+ *
+ * Writes up to num_bytes bytes of data to the comedi buffer associated with
+ * the subdevice, marks it as written and updates the acquisition scan
+ * progress.
+ *
+ * Returns the amount of data written in bytes.
+ */
 unsigned int comedi_write_array_to_buffer(struct comedi_subdevice *s,
 					  const void *data,
 					  unsigned int num_bytes)
diff --git a/drivers/staging/comedi/drivers/comedi_fc.h b/drivers/staging/comedi/drivers/comedi_fc.h
index 51b3157bd348f..75bbc3130a90b 100644
--- a/drivers/staging/comedi/drivers/comedi_fc.h
+++ b/drivers/staging/comedi/drivers/comedi_fc.h
@@ -44,13 +44,13 @@ static inline unsigned int cfc_write_array_to_buffer(struct comedi_subdevice *s,
 static inline unsigned int cfc_write_to_buffer(struct comedi_subdevice *s,
 					       unsigned short data)
 {
-	return cfc_write_array_to_buffer(s, &data, sizeof(data));
+	return comedi_write_array_to_buffer(s, &data, sizeof(data));
 };
 
 static inline unsigned int cfc_write_long_to_buffer(struct comedi_subdevice *s,
 						    unsigned int data)
 {
-	return cfc_write_array_to_buffer(s, &data, sizeof(data));
+	return comedi_write_array_to_buffer(s, &data, sizeof(data));
 };
 
 unsigned int cfc_read_array_from_buffer(struct comedi_subdevice *,