[PATCH 45/52] expo: Adjust expo_poll() to avoid looping forever

[Simon Glass]

If the user does not quickly provide some input, exit so that other
things can be done, such as searching for the next OS.

Signed-off-by: Simon Glass <s...@chromium.org>
---

 boot/expo.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/boot/expo.c b/boot/expo.c
index 4e855f60d84..bf2f1dfc68a 100644
--- a/boot/expo.c
+++ b/boot/expo.c
@@ -324,12 +324,14 @@ int expo_poll(struct expo *exp, struct expo_action *act)
 
        ichar = cli_ch_process(&exp->cch, 0);
        if (!ichar) {
-               while (!ichar && !tstc()) {
+               int i;
+
+               for (i = 0; i < 10 && !ichar && !tstc(); i++) {
                        schedule();
                        mdelay(2);
                        ichar = cli_ch_process(&exp->cch, -ETIMEDOUT);
                }
-               if (!ichar) {
+               while (!ichar && tstc()) {
                        ichar = getchar();
                        ichar = cli_ch_process(&exp->cch, ichar);
                }
-- 
2.43.0