Signed-off-by: Ben Widawsky <ben.widawsky@xxxxxxxxx>
---
include/uapi/linux/cxl_mem.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/uapi/linux/cxl_mem.h b/include/uapi/linux/cxl_mem.h
index f6e8a005b113..8dd516ddb098 100644
--- a/include/uapi/linux/cxl_mem.h
+++ b/include/uapi/linux/cxl_mem.h
@@ -81,6 +81,13 @@ static const struct {
* - @size_in = -1
* - @size_out = 0
*
+ * Commands which have a variable length input likely have a minimum length.
+ * This is not enforced by the UAPI, and therefore might look like the command
+ * succeeded when sending too small of an input payload. Caution should be taken
+ * by checking the @cxl_send_command.retval for such cases. For commands with a
+ * variable length output, the caller is free to consume as little or as much as
+ * they want.
+ *
* See struct cxl_mem_query_commands.
*/
struct cxl_command_info {
--
2.31.1
