Merge branch 'master' into for-linus

Conflicts:
	include/linux/percpu.h
	mm/percpu.c

1 files changed, 44 insertions, 25 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 24110f6f61e..167c4a6ccbc 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -31,6 +31,7 @@
 #include <linux/delay.h>
 #include <linux/platform_device.h>
 #include <linux/tty.h>
+#include <linux/ratelimit.h>
 #include <linux/tty_flip.h>
 #include <linux/serial_reg.h>
 #include <linux/serial_core.h>
@@ -154,12 +155,6 @@ struct uart_8250_port {
 	unsigned char		lsr_saved_flags;
 #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
 	unsigned char		msr_saved_flags;
-
-	/*
-	 * We provide a per-port pm hook.
-	 */
-	void			(*pm)(struct uart_port *port,
-				      unsigned int state, unsigned int old);
 };
 
 struct irq_info {
@@ -1606,8 +1601,8 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id)
 
 		if (l == i->head && pass_counter++ > PASS_LIMIT) {
 			/* If we hit this, we're dead. */
-			printk(KERN_ERR "serial8250: too much work for "
-				"irq%d\n", irq);
+			printk_ratelimited(KERN_ERR
+				"serial8250: too much work for irq%d\n", irq);
 			break;
 		}
 	} while (l != end);
@@ -1722,12 +1717,6 @@ static void serial_unlink_irq_chain(struct uart_8250_port *up)
 	mutex_unlock(&hash_mutex);
 }
 
-/* Base timer interval for polling */
-static inline int poll_timeout(int timeout)
-{
-	return timeout > 6 ? (timeout / 2 - 2) : 1;
-}
-
 /*
  * This function is used to handle ports that do not have an
  * interrupt.  This doesn't work very well for 16450's, but gives
@@ -1742,7 +1731,7 @@ static void serial8250_timeout(unsigned long data)
 	iir = serial_in(up, UART_IIR);
 	if (!(iir & UART_IIR_NO_INT))
 		serial8250_handle_port(up);
-	mod_timer(&up->timer, jiffies + poll_timeout(up->port.timeout));
+	mod_timer(&up->timer, jiffies + uart_poll_timeout(&up->port));
 }
 
 static void serial8250_backup_timeout(unsigned long data)
@@ -1787,7 +1776,7 @@ static void serial8250_backup_timeout(unsigned long data)
 
 	/* Standard timer interval plus 0.2s to keep the port running */
 	mod_timer(&up->timer,
-		jiffies + poll_timeout(up->port.timeout) + HZ / 5);
+		jiffies + uart_poll_timeout(&up->port) + HZ / 5);
 }
 
 static unsigned int serial8250_tx_empty(struct uart_port *port)
@@ -1867,15 +1856,17 @@ static void wait_for_xmitr(struct uart_8250_port *up, int bits)
 	unsigned int status, tmout = 10000;
 
 	/* Wait up to 10ms for the character(s) to be sent. */
-	do {
+	for (;;) {
 		status = serial_in(up, UART_LSR);
 
 		up->lsr_saved_flags |= status & LSR_SAVE_FLAGS;
 
+		if ((status & bits) == bits)
+			break;
 		if (--tmout == 0)
 			break;
 		udelay(1);
-	} while ((status & bits) != bits);
+	}
 
 	/* Wait up to 1s for flow control if necessary */
 	if (up->port.flags & UPF_CONS_FLOW) {
@@ -2069,7 +2060,7 @@ static int serial8250_startup(struct uart_port *port)
 		up->timer.function = serial8250_backup_timeout;
 		up->timer.data = (unsigned long)up;
 		mod_timer(&up->timer, jiffies +
-			  poll_timeout(up->port.timeout) + HZ / 5);
+			uart_poll_timeout(port) + HZ / 5);
 	}
 
 	/*
@@ -2079,7 +2070,7 @@ static int serial8250_startup(struct uart_port *port)
 	 */
 	if (!is_real_interrupt(up->port.irq)) {
 		up->timer.data = (unsigned long)up;
-		mod_timer(&up->timer, jiffies + poll_timeout(up->port.timeout));
+		mod_timer(&up->timer, jiffies + uart_poll_timeout(port));
 	} else {
 		retval = serial_link_irq_chain(up);
 		if (retval)
@@ -2440,16 +2431,24 @@ serial8250_set_ldisc(struct uart_port *port, int new)
 		port->flags &= ~UPF_HARDPPS_CD;
 }
 
-static void
-serial8250_pm(struct uart_port *port, unsigned int state,
-	      unsigned int oldstate)
+
+void serial8250_do_pm(struct uart_port *port, unsigned int state,
+		      unsigned int oldstate)
 {
 	struct uart_8250_port *p = (struct uart_8250_port *)port;
 
 	serial8250_set_sleep(p, state != 0);
+}
+EXPORT_SYMBOL(serial8250_do_pm);
 
-	if (p->pm)
-		p->pm(port, state, oldstate);
+static void
+serial8250_pm(struct uart_port *port, unsigned int state,
+	      unsigned int oldstate)
+{
+	if (port->pm)
+		port->pm(port, state, oldstate);
+	else
+		serial8250_do_pm(port, state, oldstate);
 }
 
 static unsigned int serial8250_port_size(struct uart_8250_port *pt)
@@ -2674,6 +2673,16 @@ static struct uart_ops serial8250_pops = {
 
 static struct uart_8250_port serial8250_ports[UART_NR];
 
+static void (*serial8250_isa_config)(int port, struct uart_port *up,
+	unsigned short *capabilities);
+
+void serial8250_set_isa_configurator(
+	void (*v)(int port, struct uart_port *up, unsigned short *capabilities))
+{
+	serial8250_isa_config = v;
+}
+EXPORT_SYMBOL(serial8250_set_isa_configurator);
+
 static void __init serial8250_isa_init_ports(void)
 {
 	struct uart_8250_port *up;
@@ -2719,6 +2728,9 @@ static void __init serial8250_isa_init_ports(void)
 		up->port.regshift = old_serial_port[i].iomem_reg_shift;
 		set_io_from_upio(&up->port);
 		up->port.irqflags |= irqflag;
+		if (serial8250_isa_config != NULL)
+			serial8250_isa_config(i, &up->port, &up->capabilities);
+
 	}
 }
 
@@ -3010,6 +3022,7 @@ static int __devinit serial8250_probe(struct platform_device *dev)
 		port.serial_in		= p->serial_in;
 		port.serial_out		= p->serial_out;
 		port.set_termios	= p->set_termios;
+		port.pm			= p->pm;
 		port.dev		= &dev->dev;
 		port.irqflags		|= irqflag;
 		ret = serial8250_register_port(&port);
@@ -3176,6 +3189,12 @@ int serial8250_register_port(struct uart_port *port)
 		/*  Possibly override set_termios call */
 		if (port->set_termios)
 			uart->port.set_termios = port->set_termios;
+		if (port->pm)
+			uart->port.pm = port->pm;
+
+		if (serial8250_isa_config != NULL)
+			serial8250_isa_config(0, &uart->port,
+					&uart->capabilities);
 
 		ret = uart_add_one_port(&serial8250_reg, &uart->port);
 		if (ret == 0)