This delay was in the very first OPAL console commit 6.5 years ago. The firmware console has hardened sufficiently to remove it.
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> Signed-off-by: Nicholas Piggin <npig...@gmail.com> --- drivers/tty/hvc/hvc_opal.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c index e151cfacf2a7..436b98258e60 100644 --- a/drivers/tty/hvc/hvc_opal.c +++ b/drivers/tty/hvc/hvc_opal.c @@ -307,14 +307,8 @@ static int udbg_opal_getc(void) int ch; for (;;) { ch = udbg_opal_getc_poll(); - if (ch == -1) { - /* This shouldn't be needed...but... */ - volatile unsigned long delay; - for (delay=0; delay < 2000000; delay++) - ; - } else { + if (ch != -1) return ch; - } } } -- 2.17.0