Merge branch '2022-03-09-events-subsystem' into nextnext

To quote the author:
It is a common need in U-Boot to have one subsystem notify another
when something happens. An example is reading a partition table when a
new block device is set up.

It is also common to add weak functions and 'hook' functions to modify
how U-Boot works. See for example ft_board_setup() and the like.

U-Boot would benefit from a generic mechanism to handle these cases,
with the ability to hook into various 'events' in a
subsystem-independent and transparent way.

This series provides a way to create and dispatch events, with a way of
registering a 'spy' which watches for events of different types. This
allows 'hook' functions to be created in a generic way.

It also includes a script to list the hooks in an image, which is a bit
easier to debug than weak functions, as well as an 'event' command to
do the same from within U-Boot.

These 'static' events can be used to replace hooks like misc_init_f(),
for example. Also included is basic support for 'dynamic' events, where
a spy can be registered at runtime. The need for this is still being
figured out.

1 files changed, 2 insertions, 8 deletions

diff --git a/net/tftp.c b/net/tftp.c
index 62a9648..e1e3597 100644
--- a/net/tftp.c
+++ b/net/tftp.c
@@ -27,12 +27,6 @@ DECLARE_GLOBAL_DATA_PTR;
 #define WELL_KNOWN_PORT	69
 /* Millisecs to timeout for lost pkt */
 #define TIMEOUT		5000UL
-#ifndef	CONFIG_NET_RETRY_COUNT
-/* # of timeouts before giving up */
-# define TIMEOUT_COUNT	10
-#else
-# define TIMEOUT_COUNT  (CONFIG_NET_RETRY_COUNT * 2)
-#endif
 /* Number of "loading" hashes per line (for checking the image size) */
 #define HASHES_PER_LINE	65
 
@@ -47,7 +41,7 @@ DECLARE_GLOBAL_DATA_PTR;
 #define TFTP_OACK	6
 
 static ulong timeout_ms = TIMEOUT;
-static int timeout_count_max = TIMEOUT_COUNT;
+static int timeout_count_max = (CONFIG_NET_RETRY_COUNT * 2);
 static ulong time_start;   /* Record time we started tftp */
 
 /*
@@ -60,7 +54,7 @@ static ulong time_start;   /* Record time we started tftp */
  * non-standard timeout behavior when initiating a TFTP transfer.
  */
 ulong tftp_timeout_ms = TIMEOUT;
-int tftp_timeout_count_max = TIMEOUT_COUNT;
+int tftp_timeout_count_max = (CONFIG_NET_RETRY_COUNT * 2);
 
 enum {
 	TFTP_ERR_UNDEFINED           = 0,