Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (68 commits)
  U6715 16550A serial driver support
  Char: nozomi, set tty->driver_data appropriately
  Char: nozomi, fix tty->count counting
  serial: max3107: Fix gpiolib support
  hsu: call PCI pm hooks in suspend/resume function
  hsu: some code cleanup
  hsu: add a periodic timer to check dma rx channel
  hsu: driver for Medfield High Speed UART device
  mxser: remove unnesesary NULL check
  serial: add support for OX16PCI958 card
  serial: 68328serial.c: remove dead (ALMA_ANS | DRAGONIXVZ | M68EZ328ADS)
  timbuart: use __devinit and __devexit macros for probe and remove
  serial: MMIO32 support for 8250_early.c
  serial: mcf: don't take spinlocks in already protected functions
  serial: general fixes in the serial_rs485 structure
  serial: fix missing bit coverage of ASYNC_FLAGS
  serial: "altera_uart: simplify altera_uart_console_putc()" checkpatch fixes
  serial: crisv10: formatting of pointers in printk()
  vt: Fix warning: statement with no effect due to vt_kern.h
  tty_io: remove casts from void*
  ...

66 files changed, 5243 insertions, 609 deletions

diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 273cee1cc77b..dc9641660605 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -9,6 +9,7 @@ FONTMAPFILE = cp437.uni
 
 obj-y	 += mem.o random.o tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o tty_buffer.o tty_port.o
 
+obj-y				+= tty_mutex.o
 obj-$(CONFIG_LEGACY_PTYS)	+= pty.o
 obj-$(CONFIG_UNIX98_PTYS)	+= pty.o
 obj-y				+= misc.o
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 4f8d60c25a98..a11c8c9ca3d4 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -1072,7 +1072,7 @@ static int get_serial_info(struct async_struct * info,
 	if (!retinfo)
 		return -EFAULT;
 	memset(&tmp, 0, sizeof(tmp));
-	lock_kernel();
+	tty_lock();
 	tmp.type = state->type;
 	tmp.line = state->line;
 	tmp.port = state->port;
@@ -1083,7 +1083,7 @@ static int get_serial_info(struct async_struct * info,
 	tmp.close_delay = state->close_delay;
 	tmp.closing_wait = state->closing_wait;
 	tmp.custom_divisor = state->custom_divisor;
-	unlock_kernel();
+	tty_unlock();
 	if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
 		return -EFAULT;
 	return 0;
@@ -1100,14 +1100,14 @@ static int set_serial_info(struct async_struct * info,
 	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
 		return -EFAULT;
 
-	lock_kernel();
+	tty_lock();
 	state = info->state;
 	old_state = *state;
   
 	change_irq = new_serial.irq != state->irq;
 	change_port = (new_serial.port != state->port);
 	if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) {
-	  unlock_kernel();
+	  tty_unlock();
 	  return -EINVAL;
 	}
   
@@ -1127,7 +1127,7 @@ static int set_serial_info(struct async_struct * info,
 	}
 
 	if (new_serial.baud_base < 9600) {
-		unlock_kernel();
+		tty_unlock();
 		return -EINVAL;
 	}
 
@@ -1163,7 +1163,7 @@ check_and_exit:
 		}
 	} else
 		retval = startup(info);
-	unlock_kernel();
+	tty_unlock();
 	return retval;
 }
 
@@ -1528,6 +1528,7 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
 {
 	struct async_struct * info = tty->driver_data;
 	unsigned long orig_jiffies, char_time;
+	int tty_was_locked = tty_locked();
 	int lsr;
 
 	if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
@@ -1538,7 +1539,12 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
 
 	orig_jiffies = jiffies;
 
-	lock_kernel();
+	/*
+	 * tty_wait_until_sent is called from lots of places,
+	 * with or without the BTM.
+	 */
+	if (!tty_was_locked)
+		tty_lock();
 	/*
 	 * Set the check interval to be 1/5 of the estimated time to
 	 * send a single character, and make it at least 1.  The check
@@ -1579,7 +1585,8 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
 			break;
 	}
 	__set_current_state(TASK_RUNNING);
-	unlock_kernel();
+	if (!tty_was_locked)
+		tty_unlock();
 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
 	printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
 #endif
@@ -1703,7 +1710,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
 		printk("block_til_ready blocking: ttys%d, count = %d\n",
 		       info->line, state->count);
 #endif
+		tty_unlock();
 		schedule();
+		tty_lock();
 	}
 	__set_current_state(TASK_RUNNING);
 	remove_wait_queue(&info->open_wait, &wait);
diff --git a/drivers/char/briq_panel.c b/drivers/char/briq_panel.c
index 555cd93c2ee5..d5fa113afe37 100644
--- a/drivers/char/briq_panel.c
+++ b/drivers/char/briq_panel.c
@@ -67,15 +67,15 @@ static void set_led(char state)
 
 static int briq_panel_open(struct inode *ino, struct file *filep)
 {
-	lock_kernel();
+	tty_lock();
 	/* enforce single access, vfd_is_open is protected by BKL */
 	if (vfd_is_open) {
-		unlock_kernel();
+		tty_unlock();
 		return -EBUSY;
 	}
 	vfd_is_open = 1;
 
-	unlock_kernel();
+	tty_unlock();
 	return 0;
 }
 
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 9824b4162904..27aad9422332 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -65,7 +65,6 @@
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 #include <linux/serial.h>
-#include <linux/smp_lock.h>
 #include <linux/major.h>
 #include <linux/string.h>
 #include <linux/fcntl.h>
@@ -1608,7 +1607,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp)
 	 * If the port is the middle of closing, bail out now
 	 */
 	if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
-		wait_event_interruptible(info->port.close_wait,
+		wait_event_interruptible_tty(info->port.close_wait,
 				!(info->port.flags & ASYNC_CLOSING));
 		return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
 	}
@@ -1655,7 +1654,6 @@ static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
 		return;		/* Just in case.... */
 
 	orig_jiffies = jiffies;
-	lock_kernel();
 	/*
 	 * Set the check interval to be 1/5 of the estimated time to
 	 * send a single character, and make it at least 1.  The check
@@ -1702,7 +1700,6 @@ static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
 	}
 	/* Run one more char cycle */
 	msleep_interruptible(jiffies_to_msecs(char_time * 5));
-	unlock_kernel();
 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
 	printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
 #endif
@@ -1959,7 +1956,6 @@ static int cy_chars_in_buffer(struct tty_struct *tty)
 		int char_count;
 		__u32 tx_put, tx_get, tx_bufsize;
 
-		lock_kernel();
 		tx_get = readl(&buf_ctrl->tx_get);
 		tx_put = readl(&buf_ctrl->tx_put);
 		tx_bufsize = readl(&buf_ctrl->tx_bufsize);
@@ -1971,7 +1967,6 @@ static int cy_chars_in_buffer(struct tty_struct *tty)
 		printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
 			info->line, info->xmit_cnt + char_count);
 #endif
-		unlock_kernel();
 		return info->xmit_cnt + char_count;
 	}
 #endif				/* Z_EXT_CHARS_IN_BUFFER */
@@ -2359,17 +2354,22 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
 		struct serial_struct __user *new_info)
 {
 	struct serial_struct new_serial;
+	int ret;
 
 	if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
 		return -EFAULT;
 
+	mutex_lock(&info->port.mutex);
 	if (!capable(CAP_SYS_ADMIN)) {
 		if (new_serial.close_delay != info->port.close_delay ||
 				new_serial.baud_base != info->baud ||
 				(new_serial.flags & ASYNC_FLAGS &
 					~ASYNC_USR_MASK) !=
 				(info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
+		{
+			mutex_unlock(&info->port.mutex);
 			return -EPERM;
+		}
 		info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
 				(new_serial.flags & ASYNC_USR_MASK);
 		info->baud = new_serial.baud_base;
@@ -2392,10 +2392,12 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
 check_and_exit:
 	if (info->port.flags & ASYNC_INITIALIZED) {
 		cy_set_line_char(info, tty);
-		return 0;
+		ret = 0;
 	} else {
-		return cy_startup(info, tty);
+		ret = cy_startup(info, tty);
 	}
+	mutex_unlock(&info->port.mutex);
+	return ret;
 }				/* set_serial_info */
 
 /*
@@ -2438,7 +2440,6 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file)
 
 	card = info->card;
 
-	lock_kernel();
 	if (!cy_is_Z(card)) {
 		unsigned long flags;
 		int channel = info->line - card->first_line;
@@ -2478,7 +2479,6 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file)
 			((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
 	}
 end:
-	unlock_kernel();
 	return result;
 }				/* cy_tiomget */
 
@@ -2696,7 +2696,6 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
 	printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
 		info->line, cmd, arg);
 #endif
-	lock_kernel();
 
 	switch (cmd) {
 	case CYGETMON:
@@ -2817,7 +2816,6 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
 	default:
 		ret_val = -ENOIOCTLCMD;
 	}
-	unlock_kernel();
 
 #ifdef CY_DEBUG_OTHER
 	printk(KERN_DEBUG "cyc:cy_ioctl done\n");
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 6f5ffe1320f7..d9df46aa0fba 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -36,7 +36,7 @@
 #include <linux/ctype.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
-#include <linux/smp_lock.h>
+#include <linux/slab.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/uaccess.h>
@@ -2105,7 +2105,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file,
 		break;
 	case DIGI_SETAW:
 	case DIGI_SETAF:
-		lock_kernel();
 		if (cmd == DIGI_SETAW) {
 			/* Setup an event to indicate when the transmit
 			   buffer empties */
@@ -2118,7 +2117,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file,
 			if (tty->ldisc->ops->flush_buffer)
 				tty->ldisc->ops->flush_buffer(tty);
 		}
-		unlock_kernel();
 		/* Fall Thru */
 	case DIGI_SETA:
 		if (copy_from_user(&ch->digiext, argp, sizeof(digi_t)))
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 911e1da6def2..07f3ea38b582 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -1486,7 +1486,9 @@ ip2_open( PTTY tty, struct file *pFile )
 
 	if ( tty_hung_up_p(pFile) || ( pCh->flags & ASYNC_CLOSING )) {
 		if ( pCh->flags & ASYNC_CLOSING ) {
+			tty_unlock();
 			schedule();
+			tty_lock();
 		}
 		if ( tty_hung_up_p(pFile) ) {
 			set_current_state( TASK_RUNNING );
@@ -1548,7 +1550,9 @@ ip2_open( PTTY tty, struct file *pFile )
 			rc = (( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS);
 			break;
 		}
+		tty_unlock();
 		schedule();
+		tty_lock();
 	}
 	set_current_state( TASK_RUNNING );
 	remove_wait_queue(&pCh->open_wait, &wait);
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 98310e1aae30..c27e9d21fea9 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -124,7 +124,6 @@
 #include <linux/fs.h>
 #include <linux/sched.h>
 #include <linux/serial.h>
-#include <linux/smp_lock.h>
 #include <linux/mm.h>
 #include <linux/interrupt.h>
 #include <linux/timer.h>
@@ -872,7 +871,6 @@ static struct tty_port *isicom_find_port(struct tty_struct *tty)
 static int isicom_open(struct tty_struct *tty, struct file *filp)
 {
 	struct isi_port *port;
-	struct isi_board *card;
 	struct tty_port *tport;
 
 	tport = isicom_find_port(tty);
@@ -1118,8 +1116,7 @@ static int isicom_set_serial_info(struct tty_struct *tty,
 	if (copy_from_user(&newinfo, info, sizeof(newinfo)))
 		return -EFAULT;
 
-	lock_kernel();
-
+	mutex_lock(&port->port.mutex);
 	reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
 		(newinfo.flags & ASYNC_SPD_MASK));
 
@@ -1128,7 +1125,7 @@ static int isicom_set_serial_info(struct tty_struct *tty,
 				(newinfo.closing_wait != port->port.closing_wait) ||
 				((newinfo.flags & ~ASYNC_USR_MASK) !=
 				(port->port.flags & ~ASYNC_USR_MASK))) {
-			unlock_kernel();
+			mutex_unlock(&port->port.mutex);
 			return -EPERM;
 		}
 		port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
@@ -1145,7 +1142,7 @@ static int isicom_set_serial_info(struct tty_struct *tty,
 		isicom_config_port(tty);
 		spin_unlock_irqrestore(&port->card->card_lock, flags);
 	}
-	unlock_kernel();
+	mutex_unlock(&port->port.mutex);
 	return 0;
 }
 
@@ -1154,7 +1151,7 @@ static int isicom_get_serial_info(struct isi_port *port,
 {
 	struct serial_struct out_info;
 
-	lock_kernel();
+	mutex_lock(&port->port.mutex);
 	memset(&out_info, 0, sizeof(out_info));
 /*	out_info.type = ? */
 	out_info.line = port - isi_ports;
@@ -1164,7 +1161,7 @@ static int isicom_get_serial_info(struct isi_port *port,
 /*	out_info.baud_base = ? */
 	out_info.close_delay = port->port.close_delay;
 	out_info.closing_wait = port->port.closing_wait;
-	unlock_kernel();
+	mutex_unlock(&port->port.mutex);
 	if (copy_to_user(info, &out_info, sizeof(out_info)))
 		return -EFAULT;
 	return 0;
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c
index 4e395c956a09..be28391adb79 100644
--- a/drivers/char/istallion.c
+++ b/drivers/char/istallion.c
@@ -203,9 +203,9 @@ static int		stli_shared;
  *	the board has been detected, and whether it is actually running a slave
  *	or not.
  */
-#define	BST_FOUND	0x1
-#define	BST_STARTED	0x2
-#define	BST_PROBED	0x4
+#define	BST_FOUND	0
+#define	BST_STARTED	1
+#define	BST_PROBED	2
 
 /*
  *	Define the set of port state flags. These are marked for internal
@@ -816,7 +816,7 @@ static int stli_open(struct tty_struct *tty, struct file *filp)
 	brdp = stli_brds[brdnr];
 	if (brdp == NULL)
 		return -ENODEV;
-	if ((brdp->state & BST_STARTED) == 0)
+	if (!test_bit(BST_STARTED, &brdp->state))
 		return -ENODEV;
 	portnr = MINOR2PORT(minordev);
 	if (portnr > brdp->nrports)
@@ -954,7 +954,7 @@ static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned l
  *	order of opens and closes may not be preserved across shared
  *	memory, so we must wait until it is complete.
  */
-	wait_event_interruptible(portp->raw_wait,
+	wait_event_interruptible_tty(portp->raw_wait,
 			!test_bit(ST_CLOSING, &portp->state));
 	if (signal_pending(current)) {
 		return -ERESTARTSYS;
@@ -989,7 +989,7 @@ static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned l
 	set_bit(ST_OPENING, &portp->state);
 	spin_unlock_irqrestore(&brd_lock, flags);
 
-	wait_event_interruptible(portp->raw_wait,
+	wait_event_interruptible_tty(portp->raw_wait,
 			!test_bit(ST_OPENING, &portp->state));
 	if (signal_pending(current))
 		rc = -ERESTARTSYS;
@@ -1020,7 +1020,7 @@ static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned
  *	occurs on this port.
  */
 	if (wait) {
-		wait_event_interruptible(portp->raw_wait,
+		wait_event_interruptible_tty(portp->raw_wait,
 				!test_bit(ST_CLOSING, &portp->state));
 		if (signal_pending(current)) {
 			return -ERESTARTSYS;
@@ -1052,7 +1052,7 @@ static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned
  *	to come back.
  */
 	rc = 0;
-	wait_event_interruptible(portp->raw_wait,
+	wait_event_interruptible_tty(portp->raw_wait,
 			!test_bit(ST_CLOSING, &portp->state));
 	if (signal_pending(current))
 		rc = -ERESTARTSYS;
@@ -1073,6 +1073,10 @@ static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned
 
 static int stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
 {
+	/*
+	 * no need for wait_event_tty because clearing ST_CMDING cannot block
+	 * on BTM
+	 */
 	wait_event_interruptible(portp->raw_wait,
 			!test_bit(ST_CMDING, &portp->state));
 	if (signal_pending(current))
@@ -1846,7 +1850,7 @@ static void stli_portinfo(struct seq_file *m, struct stlibrd *brdp, struct stlip
 	rc = stli_portcmdstats(NULL, portp);
 
 	uart = "UNKNOWN";
-	if (brdp->state & BST_STARTED) {
+	if (test_bit(BST_STARTED, &brdp->state)) {
 		switch (stli_comstats.hwid) {
 		case 0:	uart = "2681"; break;
 		case 1:	uart = "SC26198"; break;
@@ -1855,7 +1859,7 @@ static void stli_portinfo(struct seq_file *m, struct stlibrd *brdp, struct stlip
 	}
 	seq_printf(m, "%d: uart:%s ", portnr, uart);
 
-	if ((brdp->state & BST_STARTED) && (rc >= 0)) {
+	if (test_bit(BST_STARTED, &brdp->state) && rc >= 0) {
 		char sep;
 
 		seq_printf(m, "tx:%d rx:%d", (int) stli_comstats.txtotal,
@@ -2355,7 +2359,7 @@ static void stli_poll(unsigned long arg)
 		brdp = stli_brds[brdnr];
 		if (brdp == NULL)
 			continue;
-		if ((brdp->state & BST_STARTED) == 0)
+		if (!test_bit(BST_STARTED, &brdp->state))
 			continue;
 
 		spin_lock(&brd_lock);
@@ -3140,7 +3144,7 @@ static int stli_initecp(struct stlibrd *brdp)
 	}
 
 
-	brdp->state |= BST_FOUND;
+	set_bit(BST_FOUND, &brdp->state);
 	return 0;
 err_unmap:
 	iounmap(brdp->membase);
@@ -3297,7 +3301,7 @@ static int stli_initonb(struct stlibrd *brdp)
 	brdp->panels[0] = brdp->nrports;
 
 
-	brdp->state |= BST_FOUND;
+	set_bit(BST_FOUND, &brdp->state);
 	return 0;
 err_unmap:
 	iounmap(brdp->membase);
@@ -3407,7 +3411,7 @@ stli_donestartup:
 	spin_unlock_irqrestore(&brd_lock, flags);
 
 	if (rc == 0)
-		brdp->state |= BST_STARTED;
+		set_bit(BST_STARTED, &brdp->state);
 
 	if (! stli_timeron) {
 		stli_timeron++;
@@ -3710,7 +3714,7 @@ static int __devinit stli_pciprobe(struct pci_dev *pdev,
 	if (retval)
 		goto err_null;
 
-	brdp->state |= BST_PROBED;
+	set_bit(BST_PROBED, &brdp->state);
 	pci_set_drvdata(pdev, brdp);