Merge HEAD from master.kernel.org:/home/rmk/linux-2.6-serial

37 files changed, 176 insertions, 372 deletions

diff --git a/drivers/char/mwave/mwavedd.c b/drivers/char/mwave/mwavedd.c
index d568991ac6b3..8666171e187b 100644
--- a/drivers/char/mwave/mwavedd.c
+++ b/drivers/char/mwave/mwavedd.c
@@ -57,6 +57,7 @@
 #include <linux/sched.h>
 #include <linux/spinlock.h>
 #include <linux/delay.h>
+#include <linux/serial_8250.h>
 #include "smapi.h"
 #include "mwavedd.h"
 #include "3780i.h"
@@ -410,8 +411,8 @@ static ssize_t mwave_write(struct file *file, const char __user *buf,
 
 static int register_serial_portandirq(unsigned int port, int irq)
 {
-	struct serial_struct serial;
-
+	struct uart_port uart;
+	
 	switch ( port ) {
 		case 0x3f8:
 		case 0x2f8:
@@ -442,12 +443,14 @@ static int register_serial_portandirq(unsigned int port, int irq)
 	} /* switch */
 	/* irq is okay */
 
-	memset(&serial, 0, sizeof(serial));
-	serial.port = port;
-	serial.irq = irq;
-	serial.flags = ASYNC_SHARE_IRQ;
-
-	return register_serial(&serial);
+	memset(&uart, 0, sizeof(struct uart_port));
+	
+	uart.uartclk =  1843200;
+	uart.iobase = port;
+	uart.irq = irq;
+	uart.iotype = UPIO_PORT;
+	uart.flags =  UPF_SHARE_IRQ;
+	return serial8250_register_port(&uart);
 }
 
 
@@ -523,7 +526,7 @@ static void mwave_exit(void)
 #endif
 
 	if ( pDrvData->sLine >= 0 ) {
-		unregister_serial(pDrvData->sLine);
+		serial8250_unregister_port(pDrvData->sLine);
 	}
 	if (pDrvData->bMwaveDevRegistered) {
 		misc_deregister(&mwave_misc_dev);
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 7fc692a8f5b0..dea6589d1533 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -6,7 +6,7 @@ menu "Misc devices"
 
 config IBM_ASM
 	tristate "Device driver for IBM RSA service processor"
-	depends on X86 && PCI && EXPERIMENTAL
+	depends on X86 && PCI && EXPERIMENTAL && BROKEN
 	---help---
 	  This option enables device driver support for in-band access to the
 	  IBM RSA (Condor) service processor in eServer xSeries systems.
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index e0239a10d325..7d8bcb38797a 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -447,7 +447,7 @@ config NET_SB1250_MAC
 
 config SGI_IOC3_ETH
 	bool "SGI IOC3 Ethernet"
-	depends on NET_ETHERNET && PCI && SGI_IP27
+	depends on NET_ETHERNET && PCI && SGI_IP27 && BROKEN
 	select CRC32
 	select MII
 	help
diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c
index 0b10169961eb..aec39fb261ca 100644
--- a/drivers/serial/21285.c
+++ b/drivers/serial/21285.c
@@ -58,8 +58,7 @@ static const char serial21285_name[] = "Footbridge UART";
  *  int((BAUD_BASE - (baud >> 1)) / baud)
  */
 
-static void
-serial21285_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void serial21285_stop_tx(struct uart_port *port)
 {
 	if (tx_enabled(port)) {
 		disable_irq(IRQ_CONTX);
@@ -67,8 +66,7 @@ serial21285_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	}
 }
 
-static void
-serial21285_start_tx(struct uart_port *port, unsigned int tty_start)
+static void serial21285_start_tx(struct uart_port *port)
 {
 	if (!tx_enabled(port)) {
 		enable_irq(IRQ_CONTX);
@@ -148,7 +146,7 @@ static irqreturn_t serial21285_tx_chars(int irq, void *dev_id, struct pt_regs *r
 		goto out;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		serial21285_stop_tx(port, 0);
+		serial21285_stop_tx(port);
 		goto out;
 	}
 
@@ -164,7 +162,7 @@ static irqreturn_t serial21285_tx_chars(int irq, void *dev_id, struct pt_regs *r
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit))
-		serial21285_stop_tx(port, 0);
+		serial21285_stop_tx(port);
 
  out:
 	return IRQ_HANDLED;
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 7e8fc7c1d4cc..30a0a3d10145 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -1001,7 +1001,7 @@ static inline void __stop_tx(struct uart_8250_port *p)
 	}
 }
 
-static void serial8250_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void serial8250_stop_tx(struct uart_port *port)
 {
 	struct uart_8250_port *up = (struct uart_8250_port *)port;
 
@@ -1018,7 +1018,7 @@ static void serial8250_stop_tx(struct uart_port *port, unsigned int tty_stop)
 
 static void transmit_chars(struct uart_8250_port *up);
 
-static void serial8250_start_tx(struct uart_port *port, unsigned int tty_start)
+static void serial8250_start_tx(struct uart_port *port)
 {
 	struct uart_8250_port *up = (struct uart_8250_port *)port;
 
@@ -1158,7 +1158,11 @@ static _INLINE_ void transmit_chars(struct uart_8250_port *up)
 		up->port.x_char = 0;
 		return;
 	}
-	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
+	if (uart_tx_stopped(&up->port)) {
+		serial8250_stop_tx(&up->port);
+		return;
+	}
+	if (uart_circ_empty(xmit)) {
 		__stop_tx(up);
 		return;
 	}
@@ -2586,82 +2590,3 @@ module_param_array(probe_rsa, ulong, &probe_rsa_count, 0444);
 MODULE_PARM_DESC(probe_rsa, "Probe I/O ports for RSA");
 #endif
 MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
-
-/**
- *	register_serial - configure a 16x50 serial port at runtime
- *	@req: request structure
- *
- *	Configure the serial port specified by the request. If the
- *	port exists and is in use an error is returned. If the port
- *	is not currently in the table it is added.
- *
- *	The port is then probed and if necessary the IRQ is autodetected
- *	If this fails an error is returned.
- *
- *	On success the port is ready to use and the line number is returned.
- *
- *	Note: this function is deprecated - use serial8250_register_port
- *	instead.
- */
-int register_serial(struct serial_struct *req)
-{
-	struct uart_port port;
-
-	port.iobase   = req->port;
-	port.membase  = req->iomem_base;
-	port.irq      = req->irq;
-	port.uartclk  = req->baud_base * 16;
-	port.fifosize = req->xmit_fifo_size;
-	port.regshift = req->iomem_reg_shift;
-	port.iotype   = req->io_type;
-	port.flags    = req->flags | UPF_BOOT_AUTOCONF;
-	port.mapbase  = req->iomap_base;
-	port.dev      = NULL;
-
-	if (share_irqs)
-		port.flags |= UPF_SHARE_IRQ;
-
-	if (HIGH_BITS_OFFSET)
-		port.iobase |= (long) req->port_high << HIGH_BITS_OFFSET;
-
-	/*
-	 * If a clock rate wasn't specified by the low level driver, then
-	 * default to the standard clock rate.  This should be 115200 (*16)
-	 * and should not depend on the architecture's BASE_BAUD definition.
-	 * However, since this API will be deprecated, it's probably a
-	 * better idea to convert the drivers to use the new API
-	 * (serial8250_register_port and serial8250_unregister_port).
-	 */
-	if (port.uartclk == 0) {
-		printk(KERN_WARNING
-		       "Serial: registering port at [%08x,%08lx,%p] irq %d with zero baud_base\n",
-		       port.iobase, port.mapbase, port.membase, port.irq);
-		printk(KERN_WARNING "Serial: see %s:%d for more information\n",
-		       __FILE__, __LINE__);
-		dump_stack();
-
-		/*
-		 * Fix it up for now, but this is only a temporary measure.
-		 */
-		port.uartclk = BASE_BAUD * 16;
-	}
-
-	return serial8250_register_port(&port);
-}
-EXPORT_SYMBOL(register_serial);
-
-/**
- *	unregister_serial - remove a 16x50 serial port at runtime
- *	@line: serial line number
- *
- *	Remove one serial port.  This may not be called from interrupt
- *	context.  We hand the port back to our local PM control.
- *
- *	Note: this function is deprecated - use serial8250_unregister_port
- *	instead.
- */
-void unregister_serial(int line)
-{
-	serial8250_unregister_port(line);
-}
-EXPORT_SYMBOL(unregister_serial);
diff --git a/drivers/serial/8250.h b/drivers/serial/8250.h
index 9225c82faeb8..b1b459efda52 100644
--- a/drivers/serial/8250.h
+++ b/drivers/serial/8250.h
@@ -16,11 +16,7 @@
  */
 
 #include <linux/config.h>
-
-int serial8250_register_port(struct uart_port *);
-void serial8250_unregister_port(int line);
-void serial8250_suspend_port(int line);
-void serial8250_resume_port(int line);
+#include <linux/serial_8250.h>
 
 struct old_serial_port {
 	unsigned int uart;
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index d5797618a3b9..74b80f7c062d 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -830,7 +830,7 @@ config SERIAL_M32R_PLDSIO
 
 config SERIAL_TXX9
 	bool "TMPTX39XX/49XX SIO support"
-	depends HAS_TXX9_SERIAL
+	depends HAS_TXX9_SERIAL && BROKEN
 	select SERIAL_CORE
 	default y
 
diff --git a/drivers/serial/amba-pl010.c b/drivers/serial/amba-pl010.c
index 2884b310e54d..978e12437e61 100644
--- a/drivers/serial/amba-pl010.c
+++ b/drivers/serial/amba-pl010.c
@@ -105,7 +105,7 @@ struct uart_amba_port {
 	unsigned int		old_status;
 };
 
-static void pl010_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void pl010_stop_tx(struct uart_port *port)
 {
 	unsigned int cr;
 
@@ -114,7 +114,7 @@ static void pl010_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	UART_PUT_CR(port, cr);
 }
 
-static void pl010_start_tx(struct uart_port *port, unsigned int tty_start)
+static void pl010_start_tx(struct uart_port *port)
 {
 	unsigned int cr;
 
@@ -219,7 +219,7 @@ static void pl010_tx_chars(struct uart_port *port)
 		return;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		pl010_stop_tx(port, 0);
+		pl010_stop_tx(port);
 		return;
 	}
 
@@ -236,7 +236,7 @@ static void pl010_tx_chars(struct uart_port *port)
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit))
-		pl010_stop_tx(port, 0);
+		pl010_stop_tx(port);
 }
 
 static void pl010_modem_status(struct uart_port *port)
diff --git a/drivers/serial/amba-pl011.c b/drivers/serial/amba-pl011.c
index 7db88ee18f75..56071309744c 100644
--- a/drivers/serial/amba-pl011.c
+++ b/drivers/serial/amba-pl011.c
@@ -74,7 +74,7 @@ struct uart_amba_port {
 	unsigned int		old_status;
 };
 
-static void pl011_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void pl011_stop_tx(struct uart_port *port)
 {
 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
 
@@ -82,7 +82,7 @@ static void pl011_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	writew(uap->im, uap->port.membase + UART011_IMSC);
 }
 
-static void pl011_start_tx(struct uart_port *port, unsigned int tty_start)
+static void pl011_start_tx(struct uart_port *port)
 {
 	struct uart_amba_port *uap = (struct uart_amba_port *)port;
 
@@ -184,7 +184,7 @@ static void pl011_tx_chars(struct uart_amba_port *uap)
 		return;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&uap->port)) {
-		pl011_stop_tx(&uap->port, 0);
+		pl011_stop_tx(&uap->port);
 		return;
 	}
 
@@ -201,7 +201,7 @@ static void pl011_tx_chars(struct uart_amba_port *uap)
 		uart_write_wakeup(&uap->port);
 
 	if (uart_circ_empty(xmit))
-		pl011_stop_tx(&uap->port, 0);
+		pl011_stop_tx(&uap->port);
 }
 
 static void pl011_modem_status(struct uart_amba_port *uap)
diff --git a/drivers/serial/au1x00_uart.c b/drivers/serial/au1x00_uart.c
index 6104aeef1243..a274ebf256a1 100644
--- a/drivers/serial/au1x00_uart.c
+++ b/drivers/serial/au1x00_uart.c
@@ -200,7 +200,7 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags)
 	DEBUG_AUTOCONF("type=%s\n", uart_config[up->port.type].name);
 }
 
-static void serial8250_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void serial8250_stop_tx(struct uart_port *port)
 {
 	struct uart_8250_port *up = (struct uart_8250_port *)port;
 
@@ -210,7 +210,7 @@ static void serial8250_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	}
 }
 
-static void serial8250_start_tx(struct uart_port *port, unsigned int tty_start)
+static void serial8250_start_tx(struct uart_port *port)
 {
 	struct uart_8250_port *up = (struct uart_8250_port *)port;
 
@@ -337,7 +337,7 @@ static _INLINE_ void transmit_chars(struct uart_8250_port *up)
 		return;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
-		serial8250_stop_tx(&up->port, 0);
+		serial8250_stop_tx(&up->port);
 		return;
 	}
 
@@ -356,7 +356,7 @@ static _INLINE_ void transmit_chars(struct uart_8250_port *up)
 	DEBUG_INTR("THRE...");
 
 	if (uart_circ_empty(xmit))
-		serial8250_stop_tx(&up->port, 0);
+		serial8250_stop_tx(&up->port);
 }
 
 static _INLINE_ void check_modem_status(struct uart_8250_port *up)
diff --git a/drivers/serial/clps711x.c b/drivers/serial/clps711x.c
index e92522b33c48..d822896b488c 100644
--- a/drivers/serial/clps711x.c
+++ b/drivers/serial/clps711x.c
@@ -69,8 +69,7 @@
 
 #define tx_enabled(port)	((port)->unused[0])
 
-static void
-clps711xuart_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void clps711xuart_stop_tx(struct uart_port *port)
 {
 	if (tx_enabled(port)) {
 		disable_irq(TX_IRQ(port));
@@ -78,8 +77,7 @@ clps711xuart_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	}
 }
 
-static void
-clps711xuart_start_tx(struct uart_port *port, unsigned int tty_start)
+static void clps711xuart_start_tx(struct uart_port *port)
 {
 	if (!tx_enabled(port)) {
 		enable_irq(TX_IRQ(port));
@@ -165,7 +163,7 @@ static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id, struct pt_regs *re
 		return IRQ_HANDLED;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		clps711xuart_stop_tx(port, 0);
+		clps711xuart_stop_tx(port);
 		return IRQ_HANDLED;
 	}
 
@@ -182,7 +180,7 @@ static irqreturn_t clps711xuart_int_tx(int irq, void *dev_id, struct pt_regs *re
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit))
-		clps711xuart_stop_tx(port, 0);
+		clps711xuart_stop_tx(port);
 
 	return IRQ_HANDLED;
 }
diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index d639ac92a117..282b32351d8e 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -124,7 +124,7 @@ static unsigned int cpm_uart_get_mctrl(struct uart_port *port)
 /*
  * Stop transmitter
  */
-static void cpm_uart_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void cpm_uart_stop_tx(struct uart_port *port)
 {
 	struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
 	volatile smc_t *smcp = pinfo->smcp;
@@ -141,7 +141,7 @@ static void cpm_uart_stop_tx(struct uart_port *port, unsigned int tty_stop)
 /*
  * Start transmitter
  */
-static void cpm_uart_start_tx(struct uart_port *port, unsigned int tty_start)
+static void cpm_uart_start_tx(struct uart_port *port)
 {
 	struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
 	volatile smc_t *smcp = pinfo->smcp;
@@ -623,7 +623,7 @@ static int cpm_uart_tx_pump(struct uart_port *port)
 	}
 
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		cpm_uart_stop_tx(port, 0);
+		cpm_uart_stop_tx(port);
 		return 0;
 	}
 
@@ -656,7 +656,7 @@ static int cpm_uart_tx_pump(struct uart_port *port)
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit)) {
-		cpm_uart_stop_tx(port, 0);
+		cpm_uart_stop_tx(port);
 		return 0;
 	}
 
diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c
index 97824eeeafae..e63b9dffc8d7 100644
--- a/drivers/serial/dz.c
+++ b/drivers/serial/dz.c
@@ -112,7 +112,7 @@ static inline void dz_out(struct dz_port *dport, unsigned offset,
  * ------------------------------------------------------------
  */
 
-static void dz_stop_tx(struct uart_port *uport, unsigned int tty_stop)
+static void dz_stop_tx(struct uart_port *uport)
 {
 	struct dz_port *dport = (struct dz_port *)uport;
 	unsigned short tmp, mask = 1 << dport->port.line;
@@ -125,7 +125,7 @@ static void dz_stop_tx(struct uart_port *uport, unsigned int tty_stop)
 	spin_unlock_irqrestore(&dport->port.lock, flags);
 }
 
-static void dz_start_tx(struct uart_port *uport, unsigned int tty_start)
+static void dz_start_tx(struct uart_port *uport)
 {
 	struct dz_port *dport = (struct dz_port *)uport;
 	unsigned short tmp, mask = 1 << dport->port.line;
@@ -290,7 +290,7 @@ static inline void dz_transmit_chars(struct dz_port *dport)
 	}
 	/* if nothing to do or stopped or hardware stopped */
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) {
-		dz_stop_tx(&dport->port, 0);
+		dz_stop_tx(&dport->port);
 		return;
 	}
 
@@ -308,7 +308,7 @@ static inline void dz_transmit_chars(struct dz_port *dport)
 
 	/* Are we done */
 	if (uart_circ_empty(xmit))
-		dz_stop_tx(&dport->port, 0);
+		dz_stop_tx(&dport->port);
 }
 
 /*
@@ -440,7 +440,7 @@ static int dz_startup(struct uart_port *uport)
  */
 static void dz_shutdown(struct uart_port *uport)
 {
-	dz_stop_tx(uport, 0);
+	dz_stop_tx(uport);
 }
 
 /*
diff --git a/drivers/serial/icom.c b/drivers/serial/icom.c
index c112b32764e8..79f8df4d66b7 100644
--- a/drivers/serial/icom.c
+++ b/drivers/serial/icom.c
@@ -989,18 +989,16 @@ static unsigned int icom_get_mctrl(struct uart_port *port)
 	return result;
 }
 
-static void icom_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void icom_stop_tx(struct uart_port *port)
 {
 	unsigned char cmdReg;
 
-	if (tty_stop) {
-		trace(ICOM_PORT, "STOP", 0);
-		cmdReg = readb(&ICOM_PORT->dram->CmdReg);
-		writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
-	}
+	trace(ICOM_PORT, "STOP", 0);
+	cmdReg = readb(&ICOM_PORT->dram->CmdReg);
+	writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
 }
 
-static void icom_start_tx(struct uart_port *port, unsigned int tty_start)
+static void icom_start_tx(struct uart_port *port)
 {
 	unsigned char cmdReg;
 
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 01a8726a3f97..4c985e6b3784 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -124,7 +124,7 @@ static void imx_timeout(unsigned long data)
 /*
  * interrupts disabled on entry
  */
-static void imx_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void imx_stop_tx(struct uart_port *port)
 {
 	struct imx_port *sport = (struct imx_port *)port;
 	UCR1((u32)sport->port.membase) &= ~UCR1_TXMPTYEN;
@@ -165,13 +165,13 @@ static inline void imx_transmit_buffer(struct imx_port *sport)
 	} while (!(UTS((u32)sport->port.membase) & UTS_TXFULL));
 
 	if (uart_circ_empty(xmit))
-		imx_stop_tx(&sport->port, 0);
+		imx_stop_tx(&sport->port);
 }
 
 /*
  * interrupts disabled on entry
  */
-static void imx_start_tx(struct uart_port *port, unsigned int tty_start)
+static void imx_start_tx(struct uart_port *port)
 {
 	struct imx_port *sport = (struct imx_port *)port;
 
@@ -196,7 +196,7 @@ static irqreturn_t imx_txint(int irq, void *dev_id, struct pt_regs *regs)
 	}
 
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) {
-		imx_stop_tx(&sport->port, 0);
+		imx_stop_tx(&sport->port);
 		goto out;
 	}
 
@@ -291,13 +291,31 @@ static unsigned int imx_tx_empty(struct uart_port *port)
 	return USR2((u32)sport->port.membase) & USR2_TXDC ?  TIOCSER_TEMT : 0;
 }
 
+/*
+ * We have a modem side uart, so the meanings of RTS and CTS are inverted.
+ */
 static unsigned int imx_get_mctrl(struct uart_port *port)
 {
-	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+        struct imx_port *sport = (struct imx_port *)port;
+        unsigned int tmp = TIOCM_DSR | TIOCM_CAR;
+
+        if (USR1((u32)sport->port.membase) & USR1_RTSS)
+                tmp |= TIOCM_CTS;
+
+        if (UCR2((u32)sport->port.membase) & UCR2_CTS)
+                tmp |= TIOCM_RTS;
+
+        return tmp;
 }
 
 static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl)
 {
+        struct imx_port *sport = (struct imx_port *)port;
+
+        if (mctrl & TIOCM_RTS)
+                UCR2((u32)sport->port.membase) |= UCR2_CTS;
+        else
+                UCR2((u32)sport->port.membase) &= ~UCR2_CTS;
 }
 
 /*
diff --git a/drivers/serial/ioc4_serial.c b/drivers/serial/ioc4_serial.c
index 793c3a7cbe47..0c5c96a582b3 100644
--- a/drivers/serial/ioc4_serial.c
+++ b/drivers/serial/ioc4_serial.c
@@ -2373,10 +2373,9 @@ static unsigned int ic4_tx_empty(struct uart_port *the_port)
 /**
  * ic4_stop_tx - stop the transmitter
  * @port: Port to operate on
- * @tty_stop: Set to 1 if called via uart_stop
  *
  */
-static void ic4_stop_tx(struct uart_port *the_port, unsigned int tty_stop)
+static void ic4_stop_tx(struct uart_port *the_port)
 {
 }
 
@@ -2471,10 +2470,9 @@ static unsigned int ic4_get_mctrl(struct uart_port *the_port)
 /**
  * ic4_start_tx - Start transmitter, flush any output
  * @port: Port to operate on
- * @tty_stop: Set to 1 if called via uart_start
  *
  */
-static void ic4_start_tx(struct uart_port *the_port, unsigned int tty_stop)
+static void ic4_start_tx(struct uart_port *the_port)
 {
 	struct ioc4_port *port = get_ioc4_port(the_port);
 	unsigned long flags;
diff --git a/drivers/serial/ip22zilog.c b/drivers/serial/ip22zilog.c
index ea5bf4d4daa3..ef132349f310 100644
--- a/drivers/serial/ip22zilog.c
+++ b/drivers/serial/ip22zilog.c
@@ -592,7 +592,7 @@ static void ip22zilog_set_mctrl(struct uart_port *port, unsigned int mctrl)
 }
 
 /* The port lock is held and interrupts are disabled.  */
-static void ip22zilog_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void ip22zilog_stop_tx(struct uart_port *port)
 {
 	struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port;
 
@@ -600,7 +600,7 @@ static void ip22zilog_stop_tx(struct uart_port *port, unsigned int tty_stop)
 }
 
 /* The port lock is held and interrupts are disabled.  */
-static void ip22zilog_start_tx(struct uart_port *port, unsigned int tty_start)
+static void ip22zilog_start_tx(struct uart_port *port)
 {
 	struct uart_ip22zilog_port *up = (struct uart_ip22zilog_port *) port;
 	struct zilog_channel *channel = ZILOG_CHANNEL_FROM_PORT(port);
diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c
index 98de2258fd06..6fa0d62d6f68 100644
--- a/drivers/serial/jsm/jsm_tty.c
+++ b/drivers/serial/jsm/jsm_tty.c
@@ -113,7 +113,7 @@ static void jsm_tty_set_mctrl(struct uart_port *port, unsigned int mctrl)
 	udelay(10);
 }
 
-static void jsm_tty_start_tx(struct uart_port *port, unsigned int tty_start)
+static void jsm_tty_start_tx(struct uart_port *port)
 {
 	struct jsm_channel *channel = (struct jsm_channel *)port;
 
@@ -125,7 +125,7 @@ static void jsm_tty_start_tx(struct uart_port *port, unsigned int tty_start)
 	jsm_printk(IOCTL, INFO, &channel->ch_bd->pci_dev, "finish\n");
 }
 
-static void jsm_tty_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void jsm_tty_stop_tx(struct uart_port *port)
 {
 	struct jsm_channel *channel = (struct jsm_channel *)port;
 
diff --git a/drivers/serial/m32r_sio.c b/drivers/serial/m32r_sio.c
index 9b50560b9d16..b0ecc7537ce5 100644
--- a/drivers/serial/m32r_sio.c
+++ b/drivers/serial/m32r_sio.c
@@ -275,7 +275,7 @@ serial_out(struct uart_sio_port *up, int offset, int value)
 	__sio_out(value, offset);
 }
 
-static void m32r_sio_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void m32r_sio_stop_tx(struct uart_port *port)
 {
 	struct uart_sio_port *up = (struct uart_sio_port *)port;
 
@@ -285,7 +285,7 @@ static void m32r_sio_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	}
 }
 
-static void m32r_sio_start_tx(struct uart_port *port, unsigned int tty_start)
+static void m32r_sio_start_tx(struct uart_port *port)
 {
 #ifdef CONFIG_SERIAL_M32R_PLDSIO
 	struct uart_sio_port *up = (struct uart_sio_port *)port;
@@ -425,7 +425,7 @@ static _INLINE_ void transmit_chars(struct uart_sio_port *up)
 		return;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
-		m32r_sio_stop_tx(&up->port, 0);
+		m32r_sio_stop_tx(&up->port);
 		return;
 	}
 
@@ -446,7 +446,7 @@ static _INLINE_ void transmit_chars(struct uart_sio_port *up)
 	DEBUG_INTR("THRE...");
 
 	if (uart_circ_empty(xmit))
-		m32r_sio_stop_tx(&up->port, 0);
+		m32r_sio_stop_tx(&up->port);
 }
 
 /*
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index 2a5cf174ca30..a3cd0ee8486d 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -119,7 +119,7 @@ mpc52xx_uart_get_mctrl(struct uart_port *port)
 }
 
 static void 
-mpc52xx_uart_stop_tx(struct uart_port *port, unsigned int tty_stop)
+mpc52xx_uart_stop_tx(struct uart_port *port)
 {
 	/* port->lock taken by caller */
 	port->read_status_mask &= ~MPC52xx_PSC_IMR_TXRDY;
@@ -127,7 +127,7 @@ mpc52xx_uart_stop_tx(struct uart_port *port, unsigned int tty_stop)
 }
 
 static void 
-mpc52xx_uart_start_tx(struct uart_port *port, unsigned int tty_start)
+mpc52xx_uart_start_tx(struct uart_port *port)
 {
 	/* port->lock taken by caller */
 	port->read_status_mask |= MPC52xx_PSC_IMR_TXRDY;
@@ -485,7 +485,7 @@ mpc52xx_uart_int_tx_chars(struct uart_port *port)
 
 	/* Nothing to do ? */
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		mpc52xx_uart_stop_tx(port,0);
+		mpc52xx_uart_stop_tx(port);
 		return 0;
 	}
 
@@ -504,7 +504,7 @@ mpc52xx_uart_int_tx_chars(struct uart_port *port)
 
 	/* Maybe we're done after all */
 	if (uart_circ_empty(xmit)) {
-		mpc52xx_uart_stop_tx(port,0);
+		mpc52xx_uart_stop_tx(port);
 		return 0;
 	}
 
diff --git a/drivers/serial/mpsc.c b/drivers/serial/mpsc.c
index e43276c6a954..efe79b1fd431 100644
--- a/drivers/serial/mpsc.c
+++ b/drivers/serial/mpsc.c
@@ -1072,18 +1072,18 @@ mpsc_get_mctrl(struct uart_port *port)
 }
 
 static void
-mpsc_stop_tx(struct uart_port *port, uint tty_start)
+mpsc_stop_tx(struct uart_port *port)
 {
 	struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
 
-	pr_debug("mpsc_stop_tx[%d]: tty_start: %d\n", port->line, tty_start);
+	pr_debug("mpsc_stop_tx[%d]\n", port->line);
 
 	mpsc_freeze(pi);
 	return;
 }
 
 static void
-mpsc_start_tx(struct uart_port *port, uint tty_start)
+mpsc_start_tx(struct uart_port *port)
 {
 	struct mpsc_port_info *pi = (struct mpsc_port_info *)port;
 
@@ -1091,7 +1091,7 @@ mpsc_start_tx(struct uart_port *port, uint tty_start)
 	mpsc_copy_tx_data(pi);
 	mpsc_sdma_start_tx(pi);
 
-	pr_debug("mpsc_start_tx[%d]: tty_start: %d\n", port->line, tty_start);
+	pr_debug("mpsc_start_tx[%d]\n", port->line);
 	return;
 }
 
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c
index dadd7e19714e..189064607709 100644
--- a/drivers/serial/mux.c
+++ b/drivers/serial/mux.c
@@ -111,22 +111,20 @@ static unsigned int mux_get_mctrl(struct uart_port *port)
 /**
  * mux_stop_tx - Stop transmitting characters.
  * @port: Ptr to the uart_port.
- * @tty_stop: tty layer issue this command?
  *
  * The Serial MUX does not support this function.
  */
-static void mux_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void mux_stop_tx(struct uart_port *port)
 {
 }
 
 /**
  * mux_start_tx - Start transmitting characters.
  * @port: Ptr to the uart_port.
- * @tty_start: tty layer issue this command?
  *
  * The Serial Mux does not support this function.
  */
-static void mux_start_tx(struct uart_port *port, unsigned int tty_start)
+static void mux_start_tx(struct uart_port *port)
 {
 }
 
@@ -181,7 +179,7 @@ static void mux_write(struct uart_port *port)
 	}
 
 	if(uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		mux_stop_tx(port, 0);
+		mux_stop_tx(port);
 		return;
 	}
 
@@ -202,7 +200,7 @@ static void mux_write(struct uart_port *port)
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit))
-		mux_stop_tx(port, 0);
+		mux_stop_tx(port);
 }
 
 /**
diff --git a/drivers/serial/pmac_zilog.c b/drivers/serial/pmac_zilog.c
index 7db2f37532cf..5bfde99e245e 100644
--- a/drivers/serial/pmac_zilog.c
+++ b/drivers/serial/pmac_zilog.c
@@ -630,11 +630,10 @@ static unsigned int pmz_get_mctrl(struct uart_port *port)
 
 /* 
  * Stop TX side. Dealt like sunzilog at next Tx interrupt,
- * though for DMA, we will have to do a bit more. What is
- * the meaning of the tty_stop bit ? XXX
+ * though for DMA, we will have to do a bit more.
  * The port lock is held and interrupts are disabled.
  */
-static void pmz_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void pmz_stop_tx(struct uart_port *port)
 {
 	to_pmz(port)->flags |= PMACZILOG_FLAG_TX_STOPPED;
 }
@@ -643,7 +642,7 @@ static void pmz_stop_tx(struct uart_port *port, unsigned int tty_stop)
  * Kick the Tx side.
  * The port lock is held and interrupts are disabled.
  */
-static void pmz_start_tx(struct uart_port *port, unsigned int tty_start)
+static void pmz_start_tx(struct uart_port *port)
 {
 	struct uart_pmac_port *uap = to_pmz(port);
 	unsigned char status;
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index 461c81c93207..eaa0af835290 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -80,7 +80,7 @@ static void serial_pxa_enable_ms(struct uart_port *port)
 	serial_out(up, UART_IER, up->ier);
 }
 
-static void serial_pxa_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void serial_pxa_stop_tx(struct uart_port *port)
 {
 	struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 
@@ -185,7 +185,7 @@ static void transmit_chars(struct uart_pxa_port *up)
 		return;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
-		serial_pxa_stop_tx(&up->port, 0);
+		serial_pxa_stop_tx(&up->port);
 		return;
 	}
 
@@ -203,10 +203,10 @@ static void transmit_chars(struct uart_pxa_port *up)
 
 
 	if (uart_circ_empty(xmit))
-		serial_pxa_stop_tx(&up->port, 0);
+		serial_pxa_stop_tx(&up->port);
 }
 
-static void serial_pxa_start_tx(struct uart_port *port, unsigned int tty_start)
+static void serial_pxa_start_tx(struct uart_port *port)
 {
 	struct uart_pxa_port *up = (struct uart_pxa_port *)port;
 
diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c
index 7365d4b50b95..c361c6fb0809 100644
--- a/drivers/serial/s3c2410.c
+++ b/drivers/serial/s3c2410.c
@@ -246,8 +246,7 @@ static void s3c24xx_serial_rx_disable(struct uart_port *port)
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 
-static void
-s3c24xx_serial_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void s3c24xx_serial_stop_tx(struct uart_port *port)
 {
 	if (tx_enabled(port)) {
 		disable_irq(TX_IRQ(port));
@@ -257,8 +256,7 @@ s3c24xx_serial_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	}
 }
 
-static void
-s3c24xx_serial_start_tx(struct uart_port *port, unsigned int tty_start)
+static void s3c24xx_serial_start_tx(struct uart_port *port)
 {
 	if (!tx_enabled(port)) {
 		if (port->flags & UPF_CONS_FLOW)
@@ -424,7 +422,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id, struct pt_regs *re
 	*/
 
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		s3c24xx_serial_stop_tx(port, 0);
+		s3c24xx_serial_stop_tx(port);
 		goto out;
 	}
 
@@ -443,7 +441,7 @@ static irqreturn_t s3c24xx_serial_tx_chars(int irq, void *id, struct pt_regs *re
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit))
-		s3c24xx_serial_stop_tx(port, 0);
+		s3c24xx_serial_stop_tx(port);
 
  out:
 	return IRQ_HANDLED;
diff --git a/drivers/serial/sa1100.c b/drivers/serial/sa1100.c
index 98641c3f5ab9..1225b14f6e9d 100644
--- a/drivers/serial/sa1100.c
+++ b/drivers/serial/sa1100.c
@@ -145,7 +145,7 @@ static void sa1100_timeout(unsigned long data)
 /*
  * interrupts disabled on entry
  */
-static void sa1100_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void sa1100_stop_tx(struct uart_port *port)
 {
 	struct sa1100_port *sport = (struct sa1100_port *)port;
 	u32 utcr3;
@@ -158,7 +158,7 @@ static void sa1100_stop_tx(struct uart_port *port, unsigned int tty_stop)
 /*
  * interrupts may not be disabled on entry
  */
-static void sa1100_start_tx(struct uart_port *port, unsigned int tty_start)
+static void sa1100_start_tx(struct uart_port *port)
 {
 	struct sa1100_port *sport = (struct sa1100_port *)port;
 	unsigned long flags;
@@ -264,7 +264,7 @@ static void sa1100_tx_chars(struct sa1100_port *sport)
 	sa1100_mctrl_check(sport);
 
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) {
-		sa1100_stop_tx(&sport->port, 0);
+		sa1100_stop_tx(&sport->port);
 		return;
 	}
 
@@ -284,7 +284,7 @@ static void sa1100_tx_chars(struct sa1100_port *sport)
 		uart_write_wakeup(&sport->port);
 
 	if (uart_circ_empty(xmit))
-		sa1100_stop_tx(&sport->port, 0);
+		sa1100_stop_tx(&sport->port);
 }
 
 static irqreturn_t sa1100_int(int irq, void *dev_id, struct pt_regs *regs)
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 54699c3a00ab..dea156a62d0a 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -80,7 +80,7 @@ static void uart_stop(struct tty_struct *tty)
 	unsigned long flags;
 
 	spin_lock_irqsave(&port->lock, flags);
-	port->ops->stop_tx(port, 1);
+	port->ops->stop_tx(port);
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 
@@ -91,7 +91,7 @@ static void __uart_start(struct tty_struct *tty)
 
 	if (!uart_circ_empty(&state->info->xmit) && state->info->xmit.buf &&
 	    !tty->stopped && !tty->hw_stopped)
-		port->ops->start_tx(port, 1);
+		port->ops->start_tx(port);
 }
 
 static void uart_start(struct tty_struct *tty)
@@ -542,7 +542,7 @@ static void uart_send_xchar(struct tty_struct *tty, char ch)
 		port->x_char = ch;
 		if (ch) {
 			spin_lock_irqsave(&port->lock, flags);
-			port->ops->start_tx(port, 0);
+			port->ops->start_tx(port);
 			spin_unlock_irqrestore(&port->lock, flags);
 		}
 	}
@@ -1146,7 +1146,7 @@ static void uart_set_termios(struct tty_struct *tty, struct termios *old_termios
 		spin_lock_irqsave(&state->port->lock, flags);
 		if (!(state->port->ops->get_mctrl(state->port) & TIOCM_CTS)) {
 			tty->hw_stopped = 1;
-			state->port->ops->stop_tx(state->port, 0);
+			state->port->ops->stop_tx(state->port);
 		}
 		spin_unlock_irqrestore(&state->port->lock, flags);
 	}
@@ -1869,7 +1869,7 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *port)
 		struct uart_ops *ops = port->ops;
 
 		spin_lock_irq(&port->lock);
-		ops->stop_tx(port, 0);
+		ops->stop_tx(port);
 		ops->set_mctrl(port, 0);
 		ops->stop_rx(port);
 		spin_unlock_irq(&port->lock);
@@ -1935,7 +1935,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *port)
 		uart_change_speed(state, NULL);
 		spin_lock_irq(&port->lock);
 		ops->set_mctrl(port, port->mctrl);
-		ops->start_tx(port, 0);
+		ops->start_tx(port);
 		spin_unlock_irq(&port->lock);
 	}
 
@@ -2289,143 +2289,11 @@ int uart_match_port(struct uart_port *port1, struct uart_port *port2)
 }
 EXPORT_SYMBOL(uart_match_port);
 
-/*
- *	Try to find an unused uart_state slot for a port.
- */
-static struct uart_state *
-uart_find_match_or_unused(struct uart_driver *drv, struct uart_port *port)
-{
-	int i;
-
-	/*
-	 * First, find a port entry which matches.  Note: if we do
-	 * find a matching entry, and it has a non-zero use count,
-	 * then we can't register the port.
-	 */
-	for (i = 0; i < drv->nr; i++)
-		if (uart_match_port(drv->state[i].port, port))
-			return &drv->state[i];
-
-	/*
-	 * We didn't find a matching entry, so look for the first
-	 * free entry.  We look for one which hasn't been previously
-	 * used (indicated by zero iobase).
-	 */
-	for (i = 0; i < drv->nr; i++)
-		if (drv->state[i].port->type == PORT_UNKNOWN &&
-		    drv->state[i].port->iobase == 0 &&
-		    drv->state[i].count == 0)
-			return &drv->state[i];
-
-	/*
-	 * That also failed.  Last resort is to find any currently
-	 * entry which doesn't have a real port associated with it.
-	 */
-	for (i = 0; i < drv->nr; i++)
-		if (drv->state[i].port->type == PORT_UNKNOWN &&
-		    drv->state[i].count == 0)
-			return &drv->state[i];
-
-	return NULL;
-}
-
-/**
- *	uart_register_port: register uart settings with a port
- *	@drv: pointer to the uart low level driver structure for this port
- *	@port: uart port structure describing the port
- *
- *	Register UART settings with the specified low level driver.  Detect
- *	the type of the port if UPF_BOOT_AUTOCONF is set, and detect the
- *	IRQ if UPF_AUTO_IRQ is set.
- *
- *	We try to pick the same port for the same IO base address, so that
- *	when a modem is plugged in, unplugged and plugged back in, it gets
- *	allocated the same port.
- *
- *	Returns negative error, or positive line number.
- */
-int uart_register_port(struct uart_driver *drv, struct uart_port *port)
-{
-	struct uart_state *state;
-	int ret;
-
-	down(&port_sem);
-
-	state = uart_find_match_or_unused(drv, port);
-
-	if (state) {
-		/*
-		 * Ok, we've found a line that we can use.
-		 *
-		 * If we find a port that matches this one, and it appears
-		 * to be in-use (even if it doesn't have a type) we shouldn't
-		 * alter it underneath itself - the port may be open and
-		 * trying to do useful work.
-		 */
-		if (uart_users(state) != 0) {
-			ret = -EBUSY;
-			goto out;
-		}
-
-		/*
-		 * If the port is already initialised, don't touch it.
-		 */
-		if (state->port->type == PORT_UNKNOWN) {
-			state->port->iobase   = port->iobase;
-			state->port->membase  = port->membase;
-			state->port->irq      = port->irq;
-			state->port->uartclk  = port->uartclk;
-			state->port->fifosize = port->fifosize;
-			state->port->regshift = port->regshift;
-			state->port->iotype   = port->iotype;
-			state->port->flags    = port->flags;
-			state->port->line     = state - drv->state;
-			state->port->mapbase  = port->mapbase;
-
-			uart_configure_port(drv, state, state->port);
-		}
-
-		ret = state->port->line;
-	} else
-		ret = -ENOSPC;
- out:
-	up(&port_sem);
-	return ret;
-}
-
-/**
- *	uart_unregister_port - de-allocate a port
- *	@drv: pointer to the uart low level driver structure for this port
- *	@line: line index previously returned from uart_register_port()
- *
- *	Hang up the specified line associated with the low level driver,
- *	and mark the port as unused.
- */
-void uart_unregister_port(struct uart_driver *drv, int line)
-{
-	struct uart_state *state;
-
-	if (line < 0 || line >= drv->nr) {
-		printk(KERN_ERR "Attempt to unregister ");
-		printk("%s%d", drv->dev_name, line);
-		printk("\n");
-		return;
-	}
-
-	state = drv->state + line;
-
-	down(&port_sem);
-	uart_unconfigure_port(drv, state);
-	up(&port_sem);
-}
-
 EXPORT_SYMBOL(uart_write_wakeup);
 EXPORT_SYMBOL(uart_register_driver);
 EXPORT_SYMBOL(uart_unregister_driver);
 EXPORT_SYMBOL(uart_suspend_port);
 EXPORT_SYMBOL(uart_resume_port);
-EXPORT_SYMBOL(uart_register_port);
-EXPORT_SYMBOL(uart_unregister_port);
 EXPORT_SYMBOL(uart_add_one_port);
 EXPORT_SYMBOL(uart_remove_one_port);
 
diff --git a/drivers/serial/serial_lh7a40x.c b/drivers/serial/serial_lh7a40x.c
index 56f269b6bfb1..32f808d157a1 100644
--- a/drivers/serial/serial_lh7a40x.c
+++ b/drivers/serial/serial_lh7a40x.c
@@ -112,13 +112,12 @@ struct uart_port_lh7a40x {
 	unsigned int statusPrev; /* Most recently read modem status */
 };
 
-static void lh7a40xuart_stop_tx (struct uart_port* port, unsigned int tty_stop)
+static void lh7a40xuart_stop_tx (struct uart_port* port)
 {
 	BIT_CLR (port, UART_R_INTEN, TxInt);
 }
 
-static void lh7a40xuart_start_tx (struct uart_port* port,
-				  unsigned int tty_start)
+static void lh7a40xuart_start_tx (struct uart_port* port)
 {
 	BIT_SET (port, UART_R_INTEN, TxInt);
 
diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index d085030df70b..49afadbe461b 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -253,7 +253,7 @@ sio_quot_set(struct uart_txx9_port *up, int quot)
 		sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
 }
 
-static void serial_txx9_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void serial_txx9_stop_tx(struct uart_port *port)
 {
 	struct uart_txx9_port *up = (struct uart_txx9_port *)port;
 	unsigned long flags;
@@ -263,7 +263,7 @@ static void serial_txx9_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	spin_unlock_irqrestore(&up->port.lock, flags);
 }
 
-static void serial_txx9_start_tx(struct uart_port *port, unsigned int tty_start)
+static void serial_txx9_start_tx(struct uart_port *port)
 {
 	struct uart_txx9_port *up = (struct uart_txx9_port *)port;
 	unsigned long flags;
@@ -372,7 +372,7 @@ static inline void transmit_chars(struct uart_txx9_port *up)
 		return;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
-		serial_txx9_stop_tx(&up->port, 0);
+		serial_txx9_stop_tx(&up->port);
 		return;
 	}
 
@@ -389,7 +389,7 @@ static inline void transmit_chars(struct uart_txx9_port *up)
 		uart_write_wakeup(&up->port);
 
 	if (uart_circ_empty(xmit))
-		serial_txx9_stop_tx(&up->port, 0);
+		serial_txx9_stop_tx(&up->port);
 }
 
 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id, struct pt_regs *regs)
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index ad5b776d779b..512266307866 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -79,8 +79,8 @@ static struct sci_port *serial_console_port = 0;
 #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
 
 /* Function prototypes */
-static void sci_stop_tx(struct uart_port *port, unsigned int tty_stop);
-static void sci_start_tx(struct uart_port *port, unsigned int tty_start);
+static void sci_stop_tx(struct uart_port *port);
+static void sci_start_tx(struct uart_port *port);
 static void sci_start_rx(struct uart_port *port, unsigned int tty_start);
 static void sci_stop_rx(struct uart_port *port);
 static int sci_request_irq(struct sci_port *port);
@@ -455,7 +455,7 @@ static void sci_transmit_chars(struct uart_port *port)
 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
 		uart_write_wakeup(port);
 	if (uart_circ_empty(xmit)) {
-		sci_stop_tx(port, 0);
+		sci_stop_tx(port);
 	} else {
 		local_irq_save(flags);
 		ctrl = sci_in(port, SCSCR);
@@ -900,7 +900,7 @@ static unsigned int sci_get_mctrl(struct uart_port *port)
 	return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR;
 }
 
-static void sci_start_tx(struct uart_port *port, unsigned int tty_start)
+static void sci_start_tx(struct uart_port *port)
 {
 	struct sci_port *s = &sci_ports[port->line];
 
@@ -909,7 +909,7 @@ static void sci_start_tx(struct uart_port *port, unsigned int tty_start)
 	enable_irq(s->irqs[SCIx_TXI_IRQ]);
 }
 
-static void sci_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void sci_stop_tx(struct uart_port *port)
 {
 	unsigned long flags;
 	unsigned short ctrl;
@@ -978,7 +978,7 @@ static void sci_shutdown(struct uart_port *port)
 	struct sci_port *s = &sci_ports[port->line];
 
 	sci_stop_rx(port);
-	sci_stop_tx(port, 1);
+	sci_stop_tx(port);
 	sci_free_irq(s);
 
 #if defined(__H8300S__)
diff --git a/drivers/serial/sn_console.c b/drivers/serial/sn_console.c
index 12d1f14e78ce..313f9df24a2d 100644
--- a/drivers/serial/sn_console.c
+++ b/drivers/serial/sn_console.c
@@ -259,10 +259,9 @@ static unsigned int snp_tx_empty(struct uart_port *port)
 /**
  * snp_stop_tx - stop the transmitter - no-op for us
  * @port: Port to operat eon - we ignore - no-op function
- * @tty_stop: Set to 1 if called via uart_stop
  *
  */
-static void snp_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void snp_stop_tx(struct uart_port *port)
 {
 }
 
@@ -325,10 +324,9 @@ static void snp_stop_rx(struct uart_port *port)
 /**
  * snp_start_tx - Start transmitter
  * @port: Port to operate on
- * @tty_stop: Set to 1 if called via uart_start
  *
  */
-static void snp_start_tx(struct uart_port *port, unsigned int tty_stop)
+static void snp_start_tx(struct uart_port *port)
 {
 	if (sal_console_port.sc_ops->sal_wakeup_transmit)
 		sal_console_port.sc_ops->sal_wakeup_transmit(&sal_console_port,
@@ -615,7 +613,7 @@ static void sn_transmit_chars(struct sn_cons_port *port, int raw)
 		uart_write_wakeup(&port->sc_port);
 
 	if (uart_circ_empty(xmit))
-		snp_stop_tx(&port->sc_port, 0);	/* no-op for us */
+		snp_stop_tx(&port->sc_port);	/* no-op for us */
 }
 
 /**
diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index 8d198880756a..e971156daa60 100644
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -245,7 +245,7 @@ receive_chars(struct uart_sunsab_port *up,
 	return tty;
 }
 
-static void sunsab_stop_tx(struct uart_port *, unsigned int);
+static void sunsab_stop_tx(struct uart_port *);
 static void sunsab_tx_idle(struct uart_sunsab_port *);
 
 static void transmit_chars(struct uart_sunsab_port *up,
@@ -301,7 +301,7 @@ static void transmit_chars(struct uart_sunsab_port *up,
 		uart_write_wakeup(&up->port);
 
 	if (uart_circ_empty(xmit))
-		sunsab_stop_tx(&up->port, 0);
+		sunsab_stop_tx(&up->port);
 }
 
 static void check_status(struct uart_sunsab_port *up,
@@ -448,7 +448,7 @@ static unsigned int sunsab_get_mctrl(struct uart_port *port)
 }
 
 /* port->lock held by caller.  */
-static void sunsab_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void sunsab_stop_tx(struct uart_port *port)
 {
 	struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
 
@@ -476,7 +476,7 @@ static void sunsab_tx_idle(struct uart_sunsab_port *up)
 }
 
 /* port->lock held by caller.  */
-static void sunsab_start_tx(struct uart_port *port, unsigned int tty_start)
+static void sunsab_start_tx(struct uart_port *port)
 {
 	struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
 	struct circ_buf *xmit = &up->port.info->xmit;
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index d57a3553aea3..0cc879eb1c02 100644
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -255,21 +255,27 @@ static void disable_rsa(struct uart_sunsu_port *up)
 }
 #endif /* CONFIG_SERIAL_8250_RSA */
 
-static void sunsu_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static inline void __stop_tx(struct uart_sunsu_port *p)
+{
+	if (p->ier & UART_IER_THRI) {
+		p->ier &= ~UART_IER_THRI;
+		serial_out(p, UART_IER, p->ier);
+	}
+}
+
+static void sunsu_stop_tx(struct uart_port *port)
 {
 	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
 
-	if (up->ier & UART_IER_THRI) {
-		up->ier &= ~UART_IER_THRI;
-		serial_out(up, UART_IER, up->ier);
-	}
-	if (up->port.type == PORT_16C950 && tty_stop) {
+	__stop_tx(up);
+
+	if (up->port.type == PORT_16C950 && tty_stop /*FIXME*/) {
 		up->acr |= UART_ACR_TXDIS;
 		serial_icr_write(up, UART_ACR, up->acr);
 	}
 }
 
-static void sunsu_start_tx(struct uart_port *port, unsigned int tty_start)
+static void sunsu_start_tx(struct uart_port *port)
 {
 	struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
 
@@ -280,7 +286,7 @@ static void sunsu_start_tx(struct uart_port *port, unsigned int tty_start)
 	/*
 	 * We only do this from uart_start
 	 */
-	if (tty_start && up->port.type == PORT_16C950) {
+	if (tty_start && up->port.type == PORT_16C950 /*FIXME*/) {
 		up->acr &= ~UART_ACR_TXDIS;
 		serial_icr_write(up, UART_ACR, up->acr);
 	}
@@ -413,8 +419,12 @@ static _INLINE_ void transmit_chars(struct uart_sunsu_port *up)
 		up->port.x_char = 0;
 		return;
 	}
-	if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
-		sunsu_stop_tx(&up->port, 0);
+	if (uart_tx_stopped(&up->port)) {
+		sunsu_stop_tx(&up->port);
+		return;
+	}
+	if (uart_circ_empty(xmit)) {
+		__stop_tx(up);
 		return;
 	}
 
@@ -431,7 +441,7 @@ static _INLINE_ void transmit_chars(struct uart_sunsu_port *up)
 		uart_write_wakeup(&up->port);
 
 	if (uart_circ_empty(xmit))
-		sunsu_stop_tx(&up->port, 0);
+		__stop_tx(up);
 }
 
 static _INLINE_ void check_modem_status(struct uart_sunsu_port *up)
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index bff42a7b89d0..d75445738c88 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -684,7 +684,7 @@ static void sunzilog_set_mctrl(struct uart_port *port, unsigned int mctrl)
 }
 
 /* The port lock is held and interrupts are disabled.  */
-static void sunzilog_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void sunzilog_stop_tx(struct uart_port *port)
 {
 	struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port;
 
@@ -692,7 +692,7 @@ static void sunzilog_stop_tx(struct uart_port *port, unsigned int tty_stop)
 }
 
 /* The port lock is held and interrupts are disabled.  */
-static void sunzilog_start_tx(struct uart_port *port, unsigned int tty_start)
+static void sunzilog_start_tx(struct uart_port *port)
 {
 	struct uart_sunzilog_port *up = (struct uart_sunzilog_port *) port;
 	struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(port);
diff --git a/drivers/serial/uart00.c b/drivers/serial/uart00.c
index 186f1300cead..47b504ff38b2 100644
--- a/drivers/serial/uart00.c
+++ b/drivers/serial/uart00.c
@@ -87,7 +87,7 @@
 #define UART_TX_READY(s)	(((s) & UART_TSR_TX_LEVEL_MSK) < 15)
 //#define UART_TX_EMPTY(p)	((UART_GET_FR(p) & UART00_UARTFR_TMSK) == 0)
 
-static void uart00_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void uart00_stop_tx(struct uart_port *port)
 {
 	UART_PUT_IEC(port, UART_IEC_TIE_MSK);
 }
@@ -199,7 +199,7 @@ static void uart00_tx_chars(struct uart_port *port)
 		return;
 	}
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		uart00_stop_tx(port, 0);
+		uart00_stop_tx(port);
 		return;
 	}
 
@@ -218,10 +218,10 @@ static void uart00_tx_chars(struct uart_port *port)
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit))
-		uart00_stop_tx(port, 0);
+		uart00_stop_tx(port);
 }
 
-static void uart00_start_tx(struct uart_port *port, unsigned int tty_start)
+static void uart00_start_tx(struct uart_port *port)
 {
 	UART_PUT_IES(port, UART_IES_TIE_MSK);
 	uart00_tx_chars(port);
diff --git a/drivers/serial/v850e_uart.c b/drivers/serial/v850e_uart.c
index bb482780a41d..9378895a8d56 100644
--- a/drivers/serial/v850e_uart.c
+++ b/drivers/serial/v850e_uart.c
@@ -240,7 +240,7 @@ console_initcall(v850e_uart_console_init);
 
 /* TX/RX interrupt handlers.  */
 
-static void v850e_uart_stop_tx (struct uart_port *port, unsigned tty_stop);
+static void v850e_uart_stop_tx (struct uart_port *port);
 
 void v850e_uart_tx (struct uart_port *port)
 {
@@ -339,14 +339,14 @@ static unsigned v850e_uart_get_mctrl (struct uart_port *port)
 	return mctrl;
 }
 
-static void v850e_uart_start_tx (struct uart_port *port, unsigned tty_start)
+static void v850e_uart_start_tx (struct uart_port *port)
 {
 	v850e_intc_disable_irq (V850E_UART_TX_IRQ (port->line));
 	v850e_uart_tx (port);
 	v850e_intc_enable_irq (V850E_UART_TX_IRQ (port->line));
 }
 
-static void v850e_uart_stop_tx (struct uart_port *port, unsigned tty_stop)
+static void v850e_uart_stop_tx (struct uart_port *port)
 {
 	v850e_intc_disable_irq (V850E_UART_TX_IRQ (port->line));
 }
diff --git a/drivers/serial/vr41xx_siu.c b/drivers/serial/vr41xx_siu.c
index 1f985327b0d4..0c5d65a08f6e 100644
--- a/drivers/serial/vr41xx_siu.c
+++ b/drivers/serial/vr41xx_siu.c
@@ -284,7 +284,7 @@ static unsigned int siu_get_mctrl(struct uart_port *port)
 	return mctrl;
 }
 
-static void siu_stop_tx(struct uart_port *port, unsigned int tty_stop)
+static void siu_stop_tx(struct uart_port *port)
 {
 	unsigned long flags;
 	uint8_t ier;
@@ -298,7 +298,7 @@ static void siu_stop_tx(struct uart_port *port, unsigned int tty_stop)
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 
-static void siu_start_tx(struct uart_port *port, unsigned int tty_start)
+static void siu_start_tx(struct uart_port *port)
 {
 	unsigned long flags;
 	uint8_t ier;
@@ -458,7 +458,7 @@ static inline void transmit_chars(struct uart_port *port)
 	}
 
 	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
-		siu_stop_tx(port, 0);
+		siu_stop_tx(port);
 		return;
 	}
 
@@ -474,7 +474,7 @@ static inline void transmit_chars(struct uart_port *port)
 		uart_write_wakeup(port);
 
 	if (uart_circ_empty(xmit))
-		siu_stop_tx(port, 0);
+		siu_stop_tx(port);
 }
 
 static irqreturn_t siu_interrupt(int irq, void *dev_id, struct pt_regs *regs)