[PATCH 06/19] mxser: remove pointless xmit_buf checks
From: Jiri Slaby <hidden>
Date: 2021-11-18 07:32:02
Also in:
lkml
Subsystem:
moxa smartio/industio/intellio serial card, the rest, tty layer and serial drivers · Maintainers:
Jiri Slaby, Linus Torvalds, Greg Kroah-Hartman
xmit_buf is supposed to exist in all these functions. I.e. from tty_port_operations::activate() to ::shutdown(). So remove these checks. Signed-off-by: Jiri Slaby <redacted> --- drivers/tty/mxser.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index eb5fb4fb2aef..6e5e1c74bf3e 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c@@ -929,9 +929,6 @@ static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int cou struct mxser_port *info = tty->driver_data; unsigned long flags; - if (!info->port.xmit_buf) - return 0; - while (1) { c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
@@ -962,9 +959,6 @@ static int mxser_put_char(struct tty_struct *tty, unsigned char ch) struct mxser_port *info = tty->driver_data; unsigned long flags; - if (!info->port.xmit_buf) - return 0; - if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) return 0;
@@ -982,7 +976,7 @@ static void mxser_flush_chars(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; - if (!info->xmit_cnt || tty->flow.stopped || !info->port.xmit_buf || + if (!info->xmit_cnt || tty->flow.stopped || (tty->hw_stopped && !mxser_16550A_or_MUST(info))) return;
@@ -1397,7 +1391,7 @@ static void mxser_start(struct tty_struct *tty) unsigned long flags; spin_lock_irqsave(&info->slock, flags); - if (info->xmit_cnt && info->port.xmit_buf) + if (info->xmit_cnt) __mxser_start_tx(info); spin_unlock_irqrestore(&info->slock, flags); }
@@ -1631,9 +1625,6 @@ static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port return; } - if (port->port.xmit_buf == NULL) - return; - if (!port->xmit_cnt || tty->flow.stopped || (tty->hw_stopped && !mxser_16550A_or_MUST(port))) { __mxser_stop_tx(port);
--
2.33.1