| Message ID | 1512031988-32490-2-git-send-email-thuth@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | [for-2.12,1/7] tests/boot-serial-test: Make sure that we check the timeout regularly | expand |
diff --git a/tests/boot-serial-test.c b/tests/boot-serial-test.c index c935d69..fa4183d 100644 --- a/tests/boot-serial-test.c +++ b/tests/boot-serial-test.c @@ -43,12 +43,13 @@ static testdef_t tests[] = { static void check_guest_output(const testdef_t *test, int fd) { bool output_ok = false; - int i, nbr, pos = 0; + int i, nbr, pos = 0, ccnt; char ch; /* Poll serial output... Wait at most 60 seconds */ for (i = 0; i < 6000; ++i) { - while ((nbr = read(fd, &ch, 1)) == 1) { + ccnt = 0; + while ((nbr = read(fd, &ch, 1)) == 1 && ccnt++ < 512) { if (ch == test->expect[pos]) { pos += 1; if (test->expect[pos] == '\0') {
If the guest continuesly writes characters to the UART, we never leave the inner while loop and thus never check whether we've reached the timeout value. So if we fail to find the expected string in the UART output, the test just hangs and never finishs. Use a counter to regularly break out of the while loop to check the timeout. Signed-off-by: Thomas Huth <thuth@redhat.com> --- tests/boot-serial-test.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)