Merge 5.0-rc4 into tty-next

We need the tty and serial fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_core.c

@@ -1070,15 +1070,16 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
 
 			ret = 0;
 		}
-	}
 
-	/* Initialise interrupt backoff work if required */
-	if (up->overrun_backoff_time_ms > 0) {
-		uart->overrun_backoff_time_ms = up->overrun_backoff_time_ms;
-		INIT_DELAYED_WORK(&uart->overrun_backoff,
-				  serial_8250_overrun_backoff_work);
-	} else {
-		uart->overrun_backoff_time_ms = 0;
+		/* Initialise interrupt backoff work if required */
+		if (up->overrun_backoff_time_ms > 0) {
+			uart->overrun_backoff_time_ms =
+				up->overrun_backoff_time_ms;
+			INIT_DELAYED_WORK(&uart->overrun_backoff,
+					serial_8250_overrun_backoff_work);
+		} else {
+			uart->overrun_backoff_time_ms = 0;
+		}
 	}
 
 	mutex_unlock(&serial_mutex);

drivers/tty/serial/fsl_lpuart.c

@@ -1709,7 +1709,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
 	}
 
 	/* ask the core to calculate the divisor */
-	baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16);
+	baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 4);
 
 	spin_lock_irqsave(&sport->port.lock, flags);
 

drivers/tty/serial/qcom_geni_serial.c

@@ -221,7 +221,7 @@ static unsigned int qcom_geni_serial_get_mctrl(struct uart_port *uport)
 	unsigned int mctrl = TIOCM_DSR | TIOCM_CAR;
 	u32 geni_ios;
 
-	if (uart_console(uport) || !uart_cts_enabled(uport)) {
+	if (uart_console(uport)) {
 		mctrl |= TIOCM_CTS;
 	} else {
 		geni_ios = readl(uport->membase + SE_GENI_IOS);
@@ -237,7 +237,7 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport,
 {
 	u32 uart_manual_rfr = 0;
 
-	if (uart_console(uport) || !uart_cts_enabled(uport))
+	if (uart_console(uport))
 		return;
 
 	if (!(mctrl & TIOCM_RTS))

drivers/tty/serial/serial_core.c

@@ -550,10 +550,12 @@ static int uart_put_char(struct tty_struct *tty, unsigned char c)
 	int ret = 0;
 
 	circ = &state->xmit;
-	if (!circ->buf)
-		return 0;
-
 	port = uart_port_lock(state, flags);
+	if (!circ->buf) {
+		uart_port_unlock(port, flags);
+		return 0;
+	}
+
 	if (port && uart_circ_chars_free(circ) != 0) {
 		circ->buf[circ->head] = c;
 		circ->head = (circ->head + 1) & (UART_XMIT_SIZE - 1);
@@ -586,11 +588,13 @@ static int uart_write(struct tty_struct *tty,
 		return -EL3HLT;
 	}
 
-	circ = &state->xmit;
-	if (!circ->buf)
-		return 0;
-
 	port = uart_port_lock(state, flags);
+	circ = &state->xmit;
+	if (!circ->buf) {
+		uart_port_unlock(port, flags);
+		return 0;
+	}
+
 	while (port) {
 		c = CIRC_SPACE_TO_END(circ->head, circ->tail, UART_XMIT_SIZE);
 		if (count < c)