serial: 8250_omap: use uart_port pointer when available

There are unnecessary "up->port." accesses on many places in 8250_omap.
"port" is avalable on most places, so instead simply use "port->".

And make port available in omap8250_restore_regs() too. It's used on
many places in there.

Signed-off-by: "Jiri Slaby (SUSE)" <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/serial/8250/8250_omap.c

···
 static void __omap8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
 {
 	struct uart_8250_port *up = up_to_u8250p(port);
-	struct omap8250_priv *priv = up->port.private_data;
+	struct omap8250_priv *priv = port->private_data;
 	u8 lcr;
 
 	serial8250_do_set_mctrl(port, mctrl);
···
 
 static void omap8250_restore_regs(struct uart_8250_port *up)
 {
-	struct omap8250_priv *priv = up->port.private_data;
+	struct uart_port *port = &up->port;
+	struct omap8250_priv *priv = port->private_data;
 	struct uart_8250_dma	*dma = up->dma;
 	u8 mcr = serial8250_in_MCR(up);
 
 	/* Port locked to synchronize UART_IER access against the console. */
-	lockdep_assert_held_once(&up->port.lock);
+	lockdep_assert_held_once(&port->lock);
 
 	if (dma && dma->tx_running) {
 		/*
···
 
 	omap8250_update_mdr1(up, priv);
 
-	__omap8250_set_mctrl(&up->port, up->port.mctrl);
+	__omap8250_set_mctrl(port, port->mctrl);
 
 	serial_out(up, UART_OMAP_MDR3, priv->mdr3);
 
-	if (up->port.rs485.flags & SER_RS485_ENABLED &&
-	    up->port.rs485_config == serial8250_em485_config)
+	if (port->rs485.flags & SER_RS485_ENABLED &&
+	    port->rs485_config == serial8250_em485_config)
 		serial8250_em485_stop_tx(up, true);
 }
 
···
 				  const struct ktermios *old)
 {
 	struct uart_8250_port *up = up_to_u8250p(port);
-	struct omap8250_priv *priv = up->port.private_data;
+	struct omap8250_priv *priv = port->private_data;
 	unsigned char cval = 0;
 	unsigned int baud;
 
···
 	 * ignoring of characters only occurs if the bit is set
 	 * in @ignore_status_mask as well.
 	 */
-	up->port.read_status_mask = UART_LSR_OE | UART_LSR_DR;
+	port->read_status_mask = UART_LSR_OE | UART_LSR_DR;
 	if (termios->c_iflag & INPCK)
-		up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+		port->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
 	if (termios->c_iflag & (IGNBRK | PARMRK))
-		up->port.read_status_mask |= UART_LSR_BI;
+		port->read_status_mask |= UART_LSR_BI;
 
 	/*
 	 * Characters to ignore
 	 */
-	up->port.ignore_status_mask = 0;
+	port->ignore_status_mask = 0;
 	if (termios->c_iflag & IGNPAR)
-		up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+		port->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
 	if (termios->c_iflag & IGNBRK) {
-		up->port.ignore_status_mask |= UART_LSR_BI;
+		port->ignore_status_mask |= UART_LSR_BI;
 		/*
 		 * If we're ignoring parity and break indicators,
 		 * ignore overruns too (for real raw support).
 		 */
 		if (termios->c_iflag & IGNPAR)
-			up->port.ignore_status_mask |= UART_LSR_OE;
+			port->ignore_status_mask |= UART_LSR_OE;
 	}
 
 	/*
 	 * ignore all characters if CREAD is not set
 	 */
 	if ((termios->c_cflag & CREAD) == 0)
-		up->port.ignore_status_mask |= UART_LSR_DR;
+		port->ignore_status_mask |= UART_LSR_DR;
 
 	/*
 	 * Modem status interrupts
 	 */
 	up->ier &= ~UART_IER_MSI;
-	if (UART_ENABLE_MS(&up->port, termios->c_cflag))
+	if (UART_ENABLE_MS(port, termios->c_cflag))
 		up->ier |= UART_IER_MSI;
 
 	up->lcr = cval;
···
 	priv->xoff = termios->c_cc[VSTOP];
 
 	priv->efr = 0;
-	up->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF);
+	port->status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF);
 
-	if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW &&
+	if (termios->c_cflag & CRTSCTS && port->flags & UPF_HARD_FLOW &&
 	    !mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS) &&
 	    !mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_CTS)) {
 		/* Enable AUTOCTS (autoRTS is enabled when RTS is raised) */
-		up->port.status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
+		port->status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
 		priv->efr |= UART_EFR_CTS;
-	} else	if (up->port.flags & UPF_SOFT_FLOW) {
+	} else	if (port->flags & UPF_SOFT_FLOW) {
 		/*
 		 * OMAP rx s/w flow control is borked; the transmitter remains
 		 * stuck off even if rx flow control is subsequently disabled
···
 		 * Transmit XON1, XOFF1
 		 */
 		if (termios->c_iflag & IXOFF) {
-			up->port.status |= UPSTAT_AUTOXOFF;
+			port->status |= UPSTAT_AUTOXOFF;
 			priv->efr |= OMAP_UART_SW_TX;
 		}
 	}
···
 		uart_port_unlock_irq(port);
 	}
 
-	enable_irq(up->port.irq);
+	enable_irq(port->irq);
 
 	pm_runtime_mark_last_busy(port->dev);
 	pm_runtime_put_autosuspend(port->dev);
···
 	up->ier = 0;
 	serial_out(up, UART_IER, 0);
 	uart_port_unlock_irq(port);
-	disable_irq_nosync(up->port.irq);
+	disable_irq_nosync(port->irq);
 	dev_pm_clear_wake_irq(port->dev);
 
 	serial8250_release_dma(up);
···
 static int omap_8250_dma_handle_irq(struct uart_port *port)
 {
 	struct uart_8250_port *up = up_to_u8250p(port);
-	struct omap8250_priv *priv = up->port.private_data;
+	struct omap8250_priv *priv = port->private_data;
 	u16 status;
 	u8 iir;
 
···
 
 	serial8250_modem_status(up);
 	if (status & UART_LSR_THRE && up->dma->tx_err) {
-		if (uart_tx_stopped(&up->port) ||
-		    kfifo_is_empty(&up->port.state->port.xmit_fifo)) {
+		if (uart_tx_stopped(port) ||
+		    kfifo_is_empty(&port->state->port.xmit_fifo)) {
 			up->dma->tx_err = 0;
 			serial8250_tx_chars(up);
 		} else  {