1 files changed, 40 insertions, 23 deletions

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index cf541aab2bd0..3f779d25ec0c 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -90,8 +90,7 @@ static const struct serial8250_config uart_config[] = {
 		.name		= "16550A",
 		.fifo_size	= 16,
 		.tx_loadsz	= 16,
-		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10 |
-				  UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
+		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
 		.rxtrig_bytes	= {1, 4, 8, 14},
 		.flags		= UART_CAP_FIFO,
 	},
@@ -1211,8 +1210,8 @@ static void autoconfig(struct uart_8250_port *up)
 	if (!port->iobase && !port->mapbase && !port->membase)
 		return;
 
-	DEBUG_AUTOCONF("ttyS%d: autoconf (0x%04lx, 0x%p): ",
-		       serial_index(port), port->iobase, port->membase);
+	DEBUG_AUTOCONF("%s: autoconf (0x%04lx, 0x%p): ",
+		       port->name, port->iobase, port->membase);
 
 	/*
 	 * We really do need global IRQs disabled here - we're going to
@@ -1363,9 +1362,8 @@ out_lock:
 		fintek_8250_probe(up);
 
 	if (up->capabilities != old_capabilities) {
-		pr_warn("ttyS%d: detected caps %08x should be %08x\n",
-		       serial_index(port), old_capabilities,
-		       up->capabilities);
+		pr_warn("%s: detected caps %08x should be %08x\n",
+			port->name, old_capabilities, up->capabilities);
 	}
 out:
 	DEBUG_AUTOCONF("iir=%d ", scratch);
@@ -2212,8 +2210,7 @@ int serial8250_do_startup(struct uart_port *port)
 	 */
 	if (!(port->flags & UPF_BUGGY_UART) &&
 	    (serial_port_in(port, UART_LSR) == 0xff)) {
-		printk_ratelimited(KERN_INFO "ttyS%d: LSR safety check engaged!\n",
-				   serial_index(port));
+		pr_info_ratelimited("%s: LSR safety check engaged!\n", port->name);
 		retval = -ENODEV;
 		goto out;
 	}
@@ -2245,8 +2242,8 @@ int serial8250_do_startup(struct uart_port *port)
 	     (port->type == PORT_ALTR_16550_F128)) && (port->fifosize > 1)) {
 		/* Bounds checking of TX threshold (valid 0 to fifosize-2) */
 		if ((up->tx_loadsz < 2) || (up->tx_loadsz > port->fifosize)) {
-			pr_err("ttyS%d TX FIFO Threshold errors, skipping\n",
-			       serial_index(port));
+			pr_err("%s TX FIFO Threshold errors, skipping\n",
+			       port->name);
 		} else {
 			serial_port_out(port, UART_ALTR_AFR,
 					UART_ALTR_EN_TXFIFO_LW);
@@ -2343,8 +2340,8 @@ int serial8250_do_startup(struct uart_port *port)
 	if (lsr & UART_LSR_TEMT && iir & UART_IIR_NO_INT) {
 		if (!(up->bugs & UART_BUG_TXEN)) {
 			up->bugs |= UART_BUG_TXEN;
-			pr_debug("ttyS%d - enabling bad tx status workarounds\n",
-				 serial_index(port));
+			pr_debug("%s - enabling bad tx status workarounds\n",
+				 port->name);
 		}
 	} else {
 		up->bugs &= ~UART_BUG_TXEN;
@@ -2373,8 +2370,8 @@ dont_test_tx_en:
 	if (up->dma) {
 		retval = serial8250_request_dma(up);
 		if (retval) {
-			pr_warn_ratelimited("ttyS%d - failed to request DMA\n",
-					    serial_index(port));
+			pr_warn_ratelimited("%s - failed to request DMA\n",
+					    port->name);
 			up->dma = NULL;
 		}
 	}
@@ -2498,11 +2495,11 @@ static unsigned int npcm_get_divisor(struct uart_8250_port *up,
 	return DIV_ROUND_CLOSEST(port->uartclk, 16 * baud + 2) - 2;
 }
 
-static unsigned int serial8250_get_divisor(struct uart_8250_port *up,
-					   unsigned int baud,
-					   unsigned int *frac)
+static unsigned int serial8250_do_get_divisor(struct uart_port *port,
+					      unsigned int baud,
+					      unsigned int *frac)
 {
-	struct uart_port *port = &up->port;
+	struct uart_8250_port *up = up_to_u8250p(port);
 	unsigned int quot;
 
 	/*
@@ -2532,6 +2529,16 @@ static unsigned int serial8250_get_divisor(struct uart_8250_port *up,
 	return quot;
 }
 
+static unsigned int serial8250_get_divisor(struct uart_port *port,
+					   unsigned int baud,
+					   unsigned int *frac)
+{
+	if (port->get_divisor)
+		return port->get_divisor(port, baud, frac);
+
+	return serial8250_do_get_divisor(port, baud, frac);
+}
+
 static unsigned char serial8250_compute_lcr(struct uart_8250_port *up,
 					    tcflag_t c_cflag)
 {
@@ -2570,8 +2577,8 @@ static unsigned char serial8250_compute_lcr(struct uart_8250_port *up,
 	return cval;
 }
 
-static void serial8250_set_divisor(struct uart_port *port, unsigned int baud,
-			    unsigned int quot, unsigned int quot_frac)
+void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
+			       unsigned int quot, unsigned int quot_frac)
 {
 	struct uart_8250_port *up = up_to_u8250p(port);
 
@@ -2602,6 +2609,16 @@ static void serial8250_set_divisor(struct uart_port *port, unsigned int baud,
 		serial_port_out(port, 0x2, quot_frac);
 	}
 }
+EXPORT_SYMBOL_GPL(serial8250_do_set_divisor);
+
+static void serial8250_set_divisor(struct uart_port *port, unsigned int baud,
+				   unsigned int quot, unsigned int quot_frac)
+{
+	if (port->set_divisor)
+		port->set_divisor(port, baud, quot, quot_frac);
+	else
+		serial8250_do_set_divisor(port, baud, quot, quot_frac);
+}
 
 static unsigned int serial8250_get_baud_rate(struct uart_port *port,
 					     struct ktermios *termios,
@@ -2636,7 +2653,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
 	cval = serial8250_compute_lcr(up, termios->c_cflag);
 
 	baud = serial8250_get_baud_rate(port, termios, old);
-	quot = serial8250_get_divisor(up, baud, &frac);
+	quot = serial8250_get_divisor(port, baud, &frac);
 
 	/*
 	 * Ok, we're now changing the port state.  Do it with
@@ -3197,7 +3214,7 @@ static void serial8250_console_restore(struct uart_8250_port *up)
 		termios.c_cflag = port->state->port.tty->termios.c_cflag;
 
 	baud = serial8250_get_baud_rate(port, &termios, NULL);
-	quot = serial8250_get_divisor(up, baud, &frac);
+	quot = serial8250_get_divisor(port, baud, &frac);
 
 	serial8250_set_divisor(port, baud, quot, frac);
 	serial_port_out(port, UART_LCR, up->lcr);