[PATCH 01/13] serial: linflexuart: Fix locking in set_termios

[Larisa Grigore]

From: Radu Pirea <radu-nicolae.pirea@xxxxxxx>

Take the port->lock when set_termios is called, otherwise if characters
are sent while IP is in init mode, the IP will hang in an uncertain
state.

Fixes: 09864c1cdf5c ("tty: serial: Add linflexuart driver for S32V234")
Signed-off-by: Radu Pirea <radu-nicolae.pirea@xxxxxxx>
Signed-off-by: Larisa Grigore <larisa.grigore@xxxxxxxxxxx>
---
 drivers/tty/serial/fsl_linflexuart.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c
index e70a56de1fce..5a410e2d56ac 100644
--- a/drivers/tty/serial/fsl_linflexuart.c
+++ b/drivers/tty/serial/fsl_linflexuart.c
@@ -407,6 +407,8 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios,
 	unsigned long cr, old_cr, cr1;
 	unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
 
+	uart_port_lock_irqsave(port, &flags);
+
 	cr = readl(port->membase + UARTCR);
 	old_cr = cr;
 
@@ -475,8 +477,6 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios,
 		cr &= ~LINFLEXD_UARTCR_PCE;
 	}
 
-	uart_port_lock_irqsave(port, &flags);
-
 	port->read_status_mask = 0;
 
 	if (termios->c_iflag & INPCK)
-- 
2.47.0