The serial core may call the UART driver's start_tx() even if tx is stopped; the UART driver must verify tx should be enabled before transmitting. Reported-by: Sam Ravnborg <sam@xxxxxxxxxxxx> cc: David S. Miller <davem@xxxxxxxxxxxxx> cc: <sparclinux@xxxxxxxxxxxxxxx> Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> --- drivers/tty/serial/sunsab.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c index c83b1c6..448a93b 100644 --- a/drivers/tty/serial/sunsab.c +++ b/drivers/tty/serial/sunsab.c @@ -427,7 +427,7 @@ static void sunsab_start_tx(struct uart_port *port) struct circ_buf *xmit = &up->port.state->xmit; int i; - if (uart_circ_empty(xmit)) + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) return; up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR); -- 2.1.0 -- 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
