diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index e838c40a2589..65bb4b5e1e2b 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -279,9 +279,14 @@ struct spi_nor_erase_map {
 
 /**
  * struct spi_nor_locking_ops - SPI NOR locking methods
- * @lock:	lock a region of the SPI NOR.
- * @unlock:	unlock a region of the SPI NOR.
- * @is_locked:	check if a region of the SPI NOR is completely locked
+ * @lock:	lock a region of the SPI NOR, never locks more than what is
+ *		requested, ie. may lock less.
+ * @unlock:	unlock a region of the SPI NOR, may unlock more than what is
+ *		requested.
+ * @is_locked:	check if a region of the SPI NOR is completely locked, returns
+ *		false otherwise. This feedback may be misleading because users
+ *		may get an "unlocked" status even though a subpart of the region
+ *		is effectively locked.
  */
 struct spi_nor_locking_ops {
 	int (*lock)(struct spi_nor *nor, loff_t ofs, u64 len);