From: Raviteja Narayanam <raviteja.narayanam@xxxxxxxxxx>
set_termios function should not wait for the transmit FIFO empty
(CDNS_UART_SR_TXEMPTY) unconditionally. The tty layer takes care
of it based on the parameter passed (TCSANOW/TCSADRAIN/TCSAFLUSH).
Signed-off-by: Raviteja Narayanam <raviteja.narayanam@xxxxxxxxxx>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxxxxx>
---
drivers/tty/serial/xilinx_uartps.c | 16 ++--------------
1 file changed, 2 insertions(+), 14 deletions(-)
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 30a1425..662b8ab 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -706,20 +706,8 @@ static void cdns_uart_set_termios(struct uart_port *port,
u32 cval = 0;
unsigned int baud, minbaud, maxbaud;
unsigned long flags;
- unsigned int ctrl_reg, mode_reg, val;
- int err;
-
- /* Wait for the transmit FIFO to empty before making changes */
- if (!(readl(port->membase + CDNS_UART_CR) &
- CDNS_UART_CR_TX_DIS)) {
- err = readl_poll_timeout(port->membase + CDNS_UART_SR,
- val, (val & CDNS_UART_SR_TXEMPTY),
- 1000, TX_TIMEOUT);
- if (err) {
- dev_err(port->dev, "timed out waiting for tx empty");
- return;
- }
- }
+ unsigned int ctrl_reg, mode_reg;
+
spin_lock_irqsave(&port->lock, flags);
/* Disable the TX and RX to set baud rate */
--
2.1.1
