From ac4ac788fdadc6b703ff3322de07dee442e08e1c Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Tue, 1 May 2018 00:55:50 +1000 Subject: powerpc/powernv: move opal console flushing to udbg OPAL console writes do not have to synchronously flush firmware / hardware buffers unless they are going through the udbg path. Remove the unconditional flushing from opal_put_chars. Flush if there was no space in the buffer as an optimisation (callers loop waiting for success in that case). udbg flushing is moved to udbg_opal_putc. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman --- drivers/tty/hvc/hvc_opal.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/tty/hvc') diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c index 9645c0062a90..958c61c8f35a 100644 --- a/drivers/tty/hvc/hvc_opal.c +++ b/drivers/tty/hvc/hvc_opal.c @@ -275,6 +275,11 @@ static void udbg_opal_putc(char c) count = hvc_opal_hvsi_put_chars(termno, &c, 1); break; } + + /* This is needed for the cosole to flush + * when there aren't any interrupts. + */ + opal_flush_console(termno); } while(count == 0 || count == -EAGAIN); } -- cgit v1.2.3-59-g8ed1b