From 602c802114a10cb03415fbed0163ca9ff97fc5d4 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 31 Jul 2023 10:02:35 +0200 Subject: [PATCH] serial: move WARN_ON() in uart_write() to the condition uart code currently does the following in uart_write() and uart_flush_buffer(): if (cond) { WARN_ON(1); return; } It can be rewritten to more obvious and more readable: if (WARN_ON(cond)) return; Do so. Signed-off-by: Jiri Slaby (SUSE) Link: https://lore.kernel.org/r/20230731080244.2698-2-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 306ea1a..e31c9b6 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -593,10 +593,8 @@ static int uart_write(struct tty_struct *tty, * This means you called this function _after_ the port was * closed. No cookie for you. */ - if (!state) { - WARN_ON(1); + if (WARN_ON(!state)) return -EL3HLT; - } port = uart_port_lock(state, flags); circ = &state->xmit; @@ -659,10 +657,8 @@ static void uart_flush_buffer(struct tty_struct *tty) * This means you called this function _after_ the port was * closed. No cookie for you. */ - if (!state) { - WARN_ON(1); + if (WARN_ON(!state)) return; - } pr_debug("uart_flush_buffer(%d) called\n", tty->index); -- 2.7.4