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path: root/drivers/tty/serial/xilinx_uartps.c
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Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
-rw-r--r--drivers/tty/serial/xilinx_uartps.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 542bab37e502..cff531a51a78 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -637,10 +637,12 @@ static void cdns_uart_set_termios(struct uart_port *port,
spin_lock_irqsave(&port->lock, flags);
- /* Empty the receive FIFO 1st before making changes */
- while ((cdns_uart_readl(CDNS_UART_SR_OFFSET) &
- CDNS_UART_SR_RXEMPTY) != CDNS_UART_SR_RXEMPTY) {
- cdns_uart_readl(CDNS_UART_FIFO_OFFSET);
+ /* Wait for the transmit FIFO to empty before making changes */
+ if (!(cdns_uart_readl(CDNS_UART_CR_OFFSET) & CDNS_UART_CR_TX_DIS)) {
+ while (!(cdns_uart_readl(CDNS_UART_SR_OFFSET) &
+ CDNS_UART_SR_TXEMPTY)) {
+ cpu_relax();
+ }
}
/* Disable the TX and RX to set baud rate */