diff mbox series

[v2,3/3] serial: bcm63xx-uart: fix tx after conversion to uart_port_tx_limited()

Message ID 20240606195632.173255-4-doug@schmorgal.com
State New
Headers show
Series serial: Fix regression in omap-serial and pxa | expand

Commit Message

Doug Brown June 6, 2024, 7:56 p.m. UTC 
From: Jonas Gorski <jonas.gorski@gmail.com>

When bcm63xx-uart was converted to uart_port_tx_limited(), it implicitly
added a call to stop_tx(). This causes garbage to be put out on the
serial console. To fix this, pass UART_TX_NOSTOP in flags, and manually
call stop_tx() ourselves analogue to how a similar issue was fixed in
commit 7be50f2e8f20 ("serial: mxs-auart: fix tx").

Fixes: d11cc8c3c4b6 ("tty: serial: use uart_port_tx_limited()")
Cc: stable@vger.kernel.org
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Doug Brown <doug@schmorgal.com>
---
 drivers/tty/serial/bcm63xx_uart.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
index 34801a6f300b..b88cc28c94e3 100644
--- a/drivers/tty/serial/bcm63xx_uart.c
+++ b/drivers/tty/serial/bcm63xx_uart.c
@@ -308,8 +308,8 @@  static void bcm_uart_do_tx(struct uart_port *port)
 
 	val = bcm_uart_readl(port, UART_MCTL_REG);
 	val = (val & UART_MCTL_TXFIFOFILL_MASK) >> UART_MCTL_TXFIFOFILL_SHIFT;
-
-	pending = uart_port_tx_limited(port, ch, port->fifosize - val,
+	pending = uart_port_tx_limited_flags(port, ch, UART_TX_NOSTOP,
+		port->fifosize - val,
 		true,
 		bcm_uart_writel(port, ch, UART_FIFO_REG),
 		({}));
@@ -320,6 +320,9 @@  static void bcm_uart_do_tx(struct uart_port *port)
 	val = bcm_uart_readl(port, UART_IR_REG);
 	val &= ~UART_TX_INT_MASK;
 	bcm_uart_writel(port, val, UART_IR_REG);
+
+	if (uart_tx_stopped(port))
+		bcm_uart_stop_tx(port);
 }
 
 /*