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expo: Adjust expo_poll() to avoid looping forever

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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 <sjg@chromium.org>
This commit is contained in:
Simon Glass 2025-05-02 08:46:51 -06:00
parent 0dc8c7740c
commit 5bca479897
1 changed files with 4 additions and 2 deletions
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6
boot/expo.c
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@ -326,12 +326,14 @@ 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);
}