menu: fix timeout duration
For distro-boot, the TIMEOUT directive in the boot script specifies
how long to pause in units of 1/10 sec. [1]
Commit 8594753ba0a7 ("menu: only timeout when menu is displayed")
corrected this by simply dividing the timeout value by 10 in
menu_interactive_choice().
I see two problems:
- For example, "TIMEOUT 5" should wait for 0.5 sec, but the current
implementation cannot handle the granularity of 1/10 sec.
In fact, it never breaks because "m->timeout / 10" is zero,
which means no timeout.
- The menu API is used not only by cmd/pxe.c but also by
common/autoboot.c . For the latter case, the unit of the
timeout value is _second_ because its default is associated
with CONFIG_BOOTDELAY.
To fix the first issue, use DIV_ROUND_UP() so that the timeout value
is rounded up to the closest integer.
For the second issue, move the division to the boundary between
cmd/pxe.c and common/menu.c . This is a more desirable place because
the comment of struct pxe_menu says:
* timeout - time in tenths of a second to wait for a user key-press before
* booting the default label.
Then, the comment of menu_create() says:
* timeout - A delay in seconds to wait for user input. If 0, timeout is
* disabled, and the default choice will be returned unless prompt is 1.
[1] https://www.syslinux.org/wiki/index.php?title=SYSLINUX#TIMEOUT_timeout
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/cmd/pxe.c b/cmd/pxe.c
index 7649d92..5609545 100644
--- a/cmd/pxe.c
+++ b/cmd/pxe.c
@@ -1453,8 +1453,8 @@
/*
* Create a menu and add items for all the labels.
*/
- m = menu_create(cfg->title, cfg->timeout, cfg->prompt, label_print,
- NULL, NULL);
+ m = menu_create(cfg->title, DIV_ROUND_UP(cfg->timeout, 10),
+ cfg->prompt, label_print, NULL, NULL);
if (!m)
return NULL;