ui/ncurses: only cancel default boot on valid key events

We're seeing occasionaly failures to autoboot due to supirious key
events (getch() returing -1) on an IPMI console.

This change modifies the process_key logic to only abort the default if
we see a valid key event.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/ui/ncurses/nc-cui.c b/ui/ncurses/nc-cui.c
index 5f56409..7200a81 100644
--- a/ui/ncurses/nc-cui.c
+++ b/ui/ncurses/nc-cui.c
@@ -327,10 +327,6 @@ static int cui_process_key(void *arg)
 
 	assert(cui->current);
 
-	if (!cui->has_input)
-		discover_client_cancel_default(cui->client);
-	cui->has_input = true;
-
 	for (;;) {
 		int c = getch();
 
@@ -339,6 +335,13 @@ static int cui_process_key(void *arg)
 		if (c == ERR)
 			break;
 
+		if (!cui->has_input) {
+			pb_log("UI input received (key = %d), aborting "
+					"default boot\n", c);
+			discover_client_cancel_default(cui->client);
+			cui->has_input = true;
+		}
+
 		if (process_global_keys(cui, c))
 			continue;