Merge remote-tracking branch 'master' into queue

Merge reason: development work has dependency on kvm patches merged
upstream.

Conflicts:
	arch/powerpc/include/asm/Kbuild
	arch/powerpc/include/asm/kvm_para.h

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

11 files changed, 137 insertions, 81 deletions

diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
index 4a652999380f..a5dec1ca1b82 100644
--- a/drivers/tty/hvc/hvc_console.c
+++ b/drivers/tty/hvc/hvc_console.c
@@ -245,6 +245,20 @@ static void hvc_port_destruct(struct tty_port *port)
 	kfree(hp);
 }
 
+static void hvc_check_console(int index)
+{
+	/* Already enabled, bail out */
+	if (hvc_console.flags & CON_ENABLED)
+		return;
+
+ 	/* If this index is what the user requested, then register
+	 * now (setup won't fail at this point).  It's ok to just
+	 * call register again if previously .setup failed.
+	 */
+	if (index == hvc_console.index)
+		register_console(&hvc_console);
+}
+
 /*
  * hvc_instantiate() is an early console discovery method which locates
  * consoles * prior to the vio subsystem discovering them.  Hotplugged
@@ -275,12 +289,8 @@ int hvc_instantiate(uint32_t vtermno, int index, const struct hv_ops *ops)
 	if (last_hvc < index)
 		last_hvc = index;
 
-	/* if this index is what the user requested, then register
-	 * now (setup won't fail at this point).  It's ok to just
-	 * call register again if previously .setup failed.
-	 */
-	if (index == hvc_console.index)
-		register_console(&hvc_console);
+	/* check if we need to re-register the kernel console */
+	hvc_check_console(index);
 
 	return 0;
 }
@@ -877,10 +887,15 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data,
 		i = ++last_hvc;
 
 	hp->index = i;
+	cons_ops[i] = ops;
+	vtermnos[i] = vtermno;
 
 	list_add_tail(&(hp->next), &hvc_structs);
 	spin_unlock(&hvc_structs_lock);
 
+	/* check if we need to re-register the kernel console */
+	hvc_check_console(i);
+
 	return hp;
 }
 EXPORT_SYMBOL_GPL(hvc_alloc);
@@ -893,8 +908,12 @@ int hvc_remove(struct hvc_struct *hp)
 	tty = tty_port_tty_get(&hp->port);
 
 	spin_lock_irqsave(&hp->lock, flags);
-	if (hp->index < MAX_NR_HVC_CONSOLES)
+	if (hp->index < MAX_NR_HVC_CONSOLES) {
+		console_lock();
 		vtermnos[hp->index] = -1;
+		cons_ops[hp->index] = NULL;
+		console_unlock();
+	}
 
 	/* Don't whack hp->irq because tty_hangup() will need to free the irq. */
 
diff --git a/drivers/tty/hvc/hvc_vio.c b/drivers/tty/hvc/hvc_vio.c
index ee307799271a..070c0ee68642 100644
--- a/drivers/tty/hvc/hvc_vio.c
+++ b/drivers/tty/hvc/hvc_vio.c
@@ -230,6 +230,69 @@ static const struct hv_ops hvterm_hvsi_ops = {
 	.tiocmset = hvterm_hvsi_tiocmset,
 };
 
+static void udbg_hvc_putc(char c)
+{
+	int count = -1;
+
+	if (!hvterm_privs[0])
+		return;
+
+	if (c == '\n')
+		udbg_hvc_putc('\r');
+
+	do {
+		switch(hvterm_privs[0]->proto) {
+		case HV_PROTOCOL_RAW:
+			count = hvterm_raw_put_chars(0, &c, 1);
+			break;
+		case HV_PROTOCOL_HVSI:
+			count = hvterm_hvsi_put_chars(0, &c, 1);
+			break;
+		}
+	} while(count == 0);
+}
+
+static int udbg_hvc_getc_poll(void)
+{
+	int rc = 0;
+	char c;
+
+	if (!hvterm_privs[0])
+		return -1;
+
+	switch(hvterm_privs[0]->proto) {
+	case HV_PROTOCOL_RAW:
+		rc = hvterm_raw_get_chars(0, &c, 1);
+		break;
+	case HV_PROTOCOL_HVSI:
+		rc = hvterm_hvsi_get_chars(0, &c, 1);
+		break;
+	}
+	if (!rc)
+		return -1;
+	return c;
+}
+
+static int udbg_hvc_getc(void)
+{
+	int ch;
+
+	if (!hvterm_privs[0])
+		return -1;
+
+	for (;;) {
+		ch = udbg_hvc_getc_poll();
+		if (ch == -1) {
+			/* This shouldn't be needed...but... */
+			volatile unsigned long delay;
+			for (delay=0; delay < 2000000; delay++)
+				;
+		} else {
+			return ch;
+		}
+	}
+}
+
 static int __devinit hvc_vio_probe(struct vio_dev *vdev,
 				   const struct vio_device_id *id)
 {
@@ -289,6 +352,13 @@ static int __devinit hvc_vio_probe(struct vio_dev *vdev,
 		return PTR_ERR(hp);
 	dev_set_drvdata(&vdev->dev, hp);
 
+	/* register udbg if it's not there already for console 0 */
+	if (hp->index == 0 && !udbg_putc) {
+		udbg_putc = udbg_hvc_putc;
+		udbg_getc = udbg_hvc_getc;
+		udbg_getc_poll = udbg_hvc_getc_poll;
+	}
+
 	return 0;
 }
 
@@ -331,59 +401,6 @@ static void __exit hvc_vio_exit(void)
 }
 module_exit(hvc_vio_exit);
 
-static void udbg_hvc_putc(char c)
-{
-	int count = -1;
-
-	if (c == '\n')
-		udbg_hvc_putc('\r');
-
-	do {
-		switch(hvterm_priv0.proto) {
-		case HV_PROTOCOL_RAW:
-			count = hvterm_raw_put_chars(0, &c, 1);
-			break;
-		case HV_PROTOCOL_HVSI:
-			count = hvterm_hvsi_put_chars(0, &c, 1);
-			break;
-		}
-	} while(count == 0);
-}
-
-static int udbg_hvc_getc_poll(void)
-{
-	int rc = 0;
-	char c;
-
-	switch(hvterm_priv0.proto) {
-	case HV_PROTOCOL_RAW:
-		rc = hvterm_raw_get_chars(0, &c, 1);
-		break;
-	case HV_PROTOCOL_HVSI:
-		rc = hvterm_hvsi_get_chars(0, &c, 1);
-		break;
-	}
-	if (!rc)
-		return -1;
-	return c;
-}
-
-static int udbg_hvc_getc(void)
-{
-	int ch;
-	for (;;) {
-		ch = udbg_hvc_getc_poll();
-		if (ch == -1) {
-			/* This shouldn't be needed...but... */
-			volatile unsigned long delay;
-			for (delay=0; delay < 2000000; delay++)
-				;
-		} else {
-			return ch;
-		}
-	}
-}
-
 void __init hvc_vio_init_early(void)
 {
 	struct device_node *stdout_node;
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 2944ff88fdc0..f4abfe238f98 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -478,7 +478,6 @@ static void xencons_backend_changed(struct xenbus_device *dev,
 	case XenbusStateInitialising:
 	case XenbusStateInitialised:
 	case XenbusStateUnknown:
-	case XenbusStateClosed:
 		break;
 
 	case XenbusStateInitWait:
@@ -488,6 +487,10 @@ static void xencons_backend_changed(struct xenbus_device *dev,
 		xenbus_switch_state(dev, XenbusStateConnected);
 		break;
 
+	case XenbusStateClosed:
+		if (dev->state == XenbusStateClosed)
+			break;
+		/* Missed the backend's CLOSING state -- fallthrough */
 	case XenbusStateClosing:
 		xenbus_frontend_closed(dev);
 		break;
diff --git a/drivers/tty/serial/8250/8250_hp300.c b/drivers/tty/serial/8250/8250_hp300.c
index 8f1dd2cc00a8..f3d0edf46644 100644
--- a/drivers/tty/serial/8250/8250_hp300.c
+++ b/drivers/tty/serial/8250/8250_hp300.c
@@ -162,7 +162,7 @@ int __init hp300_setup_serial_console(void)
 static int __devinit hpdca_init_one(struct dio_dev *d,
 				const struct dio_device_id *ent)
 {
-	struct uart_port port;
+	struct uart_8250_port uart;
 	int line;
 
 #ifdef CONFIG_SERIAL_8250_CONSOLE
@@ -174,19 +174,19 @@ static int __devinit hpdca_init_one(struct dio_dev *d,
 	memset(&uart, 0, sizeof(uart));
 
 	/* Memory mapped I/O */
-	port.iotype = UPIO_MEM;
-	port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
-	port.irq = d->ipl;
-	port.uartclk = HPDCA_BAUD_BASE * 16;
-	port.mapbase = (d->resource.start + UART_OFFSET);
-	port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE);
-	port.regshift = 1;
-	port.dev = &d->dev;
+	uart.port.iotype = UPIO_MEM;
+	uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF;
+	uart.port.irq = d->ipl;
+	uart.port.uartclk = HPDCA_BAUD_BASE * 16;
+	uart.port.mapbase = (d->resource.start + UART_OFFSET);
+	uart.port.membase = (char *)(uart.port.mapbase + DIO_VIRADDRBASE);
+	uart.port.regshift = 1;
+	uart.port.dev = &d->dev;
 	line = serial8250_register_8250_port(&uart);
 
 	if (line < 0) {
 		printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d"
-		       " irq %d failed\n", d->scode, port.irq);
+		       " irq %d failed\n", d->scode, uart.port.irq);
 		return -ENOMEM;
 	}
 
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 233fbaaf2559..2a53be5f010d 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1150,7 +1150,7 @@ config SERIAL_SC26XX_CONSOLE
 	  Support for Console on SC2681/SC2692 serial ports.
 
 config SERIAL_SCCNXP
-	bool "SCCNXP serial port support"
+	tristate "SCCNXP serial port support"
 	depends on !SERIAL_SC26XX
 	select SERIAL_CORE
 	default n
@@ -1162,7 +1162,7 @@ config SERIAL_SCCNXP
 
 config SERIAL_SCCNXP_CONSOLE
 	bool "Console on SCCNXP serial port"
-	depends on SERIAL_SCCNXP
+	depends on SERIAL_SCCNXP=y
 	select SERIAL_CORE_CONSOLE
 	help
 	  Support for console on SCCNXP serial ports.
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
index c0b334327d93..10020547c60b 100644
--- a/drivers/tty/serial/kgdboc.c
+++ b/drivers/tty/serial/kgdboc.c
@@ -97,7 +97,8 @@ static void kgdboc_restore_input(void)
 
 static int kgdboc_register_kbd(char **cptr)
 {
-	if (strncmp(*cptr, "kbd", 3) == 0) {
+	if (strncmp(*cptr, "kbd", 3) == 0 ||
+		strncmp(*cptr, "kdb", 3) == 0) {
 		if (kdb_poll_idx < KDB_POLL_FUNC_MAX) {
 			kdb_poll_funcs[kdb_poll_idx] = kdb_get_kbd_char;
 			kdb_poll_idx++;
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 6ede6fd92b4c..6d3d26a607b9 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -671,19 +671,19 @@ serial_omap_configure_xonxoff
 
 	/*
 	 * IXON Flag:
-	 * Flow control for OMAP.TX
-	 * OMAP.RX should listen for XON/XOFF
+	 * Enable XON/XOFF flow control on output.
+	 * Transmit XON1, XOFF1
 	 */
 	if (termios->c_iflag & IXON)
-		up->efr |= OMAP_UART_SW_RX;
+		up->efr |= OMAP_UART_SW_TX;
 
 	/*
 	 * IXOFF Flag:
-	 * Flow control for OMAP.RX
-	 * OMAP.TX should send XON/XOFF
+	 * Enable XON/XOFF flow control on input.
+	 * Receiver compares XON1, XOFF1.
 	 */
 	if (termios->c_iflag & IXOFF)
-		up->efr |= OMAP_UART_SW_TX;
+		up->efr |= OMAP_UART_SW_RX;
 
 	serial_out(up, UART_EFR, up->efr | UART_EFR_ECB);
 	serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A);
diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c
index b7086d004f5f..e821068cd95b 100644
--- a/drivers/tty/serial/sccnxp.c
+++ b/drivers/tty/serial/sccnxp.c
@@ -971,6 +971,7 @@ static const struct platform_device_id sccnxp_id_table[] = {
 	{ "sc28202",	SCCNXP_TYPE_SC28202 },
 	{ "sc68681",	SCCNXP_TYPE_SC68681 },
 	{ "sc68692",	SCCNXP_TYPE_SC68692 },
+	{ },
 };
 MODULE_DEVICE_TABLE(platform, sccnxp_id_table);
 
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 9be296cf7295..6ee59001d61d 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -530,7 +530,8 @@ static inline int sci_rxd_in(struct uart_port *port)
 	if (s->cfg->port_reg <= 0)
 		return 1;
 
-	return !!__raw_readb(s->cfg->port_reg);
+	/* Cast for ARM damage */
+	return !!__raw_readb((void __iomem *)s->cfg->port_reg);
 }
 
 /* ********************************************************************** *
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index 05728894a88c..16ee6cee07da 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -452,6 +452,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = {
 	NULL,				/* v */
 	&sysrq_showstate_blocked_op,	/* w */
 	/* x: May be registered on ppc/powerpc for xmon */
+	/* x: May be registered on sparc64 for global PMU dump */
 	NULL,				/* x */
 	/* y: May be registered on sparc64 for global register dump */
 	NULL,				/* y */
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 999ca63afdef..f87d7e8964bf 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3442,6 +3442,19 @@ int con_debug_enter(struct vc_data *vc)
 			kdb_set(2, setargs);
 		}
 	}
+	if (vc->vc_cols < 999) {
+		int colcount;
+		char cols[4];
+		const char *setargs[3] = {
+			"set",
+			"COLUMNS",
+			cols,
+		};
+		if (kdbgetintenv(setargs[0], &colcount)) {
+			snprintf(cols, 4, "%i", vc->vc_cols);
+			kdb_set(2, setargs);
+		}
+	}
 #endif /* CONFIG_KGDB_KDB */
 	return ret;
 }