flash_{un,}lock: document block count == -1

These utilities have accepted -1 as a block count to mean "all blocks."
Let's document that.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/flash_unlock.c b/flash_unlock.c
index d775c0b01950e64a7c9ae8b6823e7dc68b1cdc2b..f51870aeb69f2819ff44da305caaf6a73918f572 100644 (file)
--- a/flash_unlock.c
+++ b/flash_unlock.c
@@ -52,7 +52,8 @@ static void usage(int status)
                " -u         --unlock            Unlock a region of flash\n"
                "\n"
                "If offset is not specified, it defaults to 0.\n"
-               "If block count is not specified, it defaults to all blocks.\n",
+               "If block count is not specified, it defaults to all blocks.\n"
+               "A block count of -1 means all blocks.\n",
                flash_msg[DEFAULT_REQUEST],
                PROGRAM_NAME);
        exit(status);