From: Mike Frysinger <vapier.adi@xxxxxxxxx> Signed-off-by: Mike Frysinger <vapier.adi@xxxxxxxxx> Signed-off-by: Bryan Wu <cooloney@xxxxxxxxxx> Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> --- drivers/serial/bfin_5xx.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index d46d764..c7c0c1b 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -1127,6 +1127,10 @@ static __init void early_serial_putc(struct uart_port *port, int ch) unsigned timeout = 0xffff; struct bfin_serial_port *uart = (struct bfin_serial_port *)port; + /* We cannot cpu_relax() here as doing so on the BF561 relies + * on the per-cpu region being setup, and since this is early + * serial code, it may not yet be usable ... + */ while ((!(UART_GET_LSR(uart) & THRE)) && --timeout) barrier(); -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
