[PATCH 0/3] Remove ASYNC_CLOSING

[PATCH 0/3] Remove ASYNC_CLOSING

[Peter Hurley]

Hi Greg,

This series removes ASYNC_CLOSING from kernel use. However, the definition
is in a uapi header so I think it needs to stay.

The mxser driver used ASYNC_CLOSING to purge its fifo _with each
byte received_ while closing. This is clearly unnecessary but the
hangup/shutdown sequence in that driver is spaghetti and I don't have
the hardware to test (what I would consider to be) the proper fix:
cleaning up its hangup/shutdown so that clearing the fifo can be
done once in shutdown.

The isdn subsystem used ASYNC_CLOSING for unclear purposes; the
immediate effect was to prevent sending AT commands from the
emulator, but its not clear why that's necessary when closing.
Since idsn does not use the tty_port helpers, I simply added
to isdn the equivalent of an ASYNC_CLOSING flag.

Regards,

Peter Hurley (3):
  tty: mxser: Remove ASYNC_CLOSING
  isdn: Remove ASYNC_CLOSING
  tty: Remove ASYNC_CLOSING

 drivers/isdn/i4l/isdn_tty.c      | 12 ++++++------
 drivers/s390/char/con3215.c      |  3 +--
 drivers/tty/mxser.c              |  9 +++++----
 drivers/tty/rocket.c             |  2 +-
 drivers/tty/serial/68328serial.c |  3 +--
 drivers/tty/serial/crisv10.c     |  3 +--
 drivers/tty/serial/serial_core.c |  1 -
 drivers/tty/tty_port.c           |  3 +--
 include/linux/isdn.h             |  1 +
 net/irda/ircomm/ircomm_tty.c     |  4 ----
 10 files changed, 17 insertions(+), 24 deletions(-)

-- 
2.6.3

[PATCH 1/3] tty: mxser: Remove ASYNC_CLOSING

[Peter Hurley]

The tty core no longer provides ASYNC_CLOSING. Use private flag for
same purpose, which is to clear the fifos at each and every interrupt
during driver close(). The driver uses this sledgehammer approach because
its close/shutdown sequence is hopelessly borked.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 drivers/tty/mxser.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 4c4a236..944da4c 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -254,6 +254,7 @@ struct mxser_port {
 	int xmit_head;
 	int xmit_tail;
 	int xmit_cnt;
+	int closing;
 
 	struct ktermios normal_termios;
 
@@ -1081,6 +1082,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 		return;
 	if (tty_port_close_start(port, tty, filp) == 0)
 		return;
+	info->closing = 1;
 	mutex_lock(&port->mutex);
 	mxser_close_port(port);
 	mxser_flush_buffer(tty);
@@ -1091,6 +1093,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 	mxser_shutdown_port(port);
 	clear_bit(ASYNCB_INITIALIZED, &port->flags);
 	mutex_unlock(&port->mutex);
+	info->closing = 0;
 	/* Right now the tty_port set is done outside of the close_end helper
 	   as we don't yet have everyone using refcounts */	
 	tty_port_close_end(port, tty);
@@ -2255,10 +2258,8 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id)
 					break;
 				iir &= MOXA_MUST_IIR_MASK;
 				tty = tty_port_tty_get(&port->port);
-				if (!tty ||
-						(port->port.flags & ASYNC_CLOSING) ||
-						!(port->port.flags &
-							ASYNC_INITIALIZED)) {
+				if (!tty || port->closing ||
+				    !(port->port.flags & ASYNC_INITIALIZED)) {
 					status = inb(port->ioaddr + UART_LSR);
 					outb(0x27, port->ioaddr + UART_FCR);
 					inb(port->ioaddr + UART_MSR);
-- 
2.6.3

[PATCH 2/3] isdn: Remove ASYNC_CLOSING

[Peter Hurley]

The tty core no longer provides ASYNC_CLOSING. Use private flag for
same purpose, which is to disable AT-emulator output (why this is
necessary is not clear).

Cc: Karsten Keil <isdn@linux-pingi.de>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 drivers/isdn/i4l/isdn_tty.c | 12 ++++++------
 include/linux/isdn.h        |  1 +
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index cddba25..80de2a1 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1572,7 +1572,7 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
 #endif
 		return;
 	}
-	port->flags |= ASYNC_CLOSING;
+	info->closing = 1;
 
 	tty_ldisc_closing(tty);
 	/*
@@ -1603,6 +1603,7 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
 	info->ncarrier = 0;
 
 	tty_port_close_end(port, tty);
+	info->closing = 0;
 #ifdef ISDN_DEBUG_MODEM_OPEN
 	printk(KERN_DEBUG "isdn_tty_close normal exit\n");
 #endif
@@ -2236,7 +2237,7 @@ isdn_tty_at_cout(char *msg, modem_info *info)
 	l = strlen(msg);
 
 	spin_lock_irqsave(&info->readlock, flags);
-	if (port->flags & ASYNC_CLOSING) {
+	if (info->closing) {
 		spin_unlock_irqrestore(&info->readlock, flags);
 		return;
 	}
@@ -2386,13 +2387,12 @@ isdn_tty_modem_result(int code, modem_info *info)
 	case RESULT_NO_CARRIER:
 #ifdef ISDN_DEBUG_MODEM_HUP
 		printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
-		       (info->port.flags & ASYNC_CLOSING),
-		       (!info->port.tty));
+		       info->closing, !info->port.tty);
 #endif
 		m->mdmreg[REG_RINGCNT] = 0;
 		del_timer(&info->nc_timer);
 		info->ncarrier = 0;
-		if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
+		if (info->closing || !info->port.tty)
 			return;
 
 #ifdef CONFIG_ISDN_AUDIO
@@ -2525,7 +2525,7 @@ isdn_tty_modem_result(int code, modem_info *info)
 		}
 	}
 	if (code == RESULT_NO_CARRIER) {
-		if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
+		if (info->closing || (!info->port.tty))
 			return;
 
 		if (info->port.flags & ASYNC_CHECK_CD)
diff --git a/include/linux/isdn.h b/include/linux/isdn.h
index 1e9a0f2..df97c84 100644
--- a/include/linux/isdn.h
+++ b/include/linux/isdn.h
@@ -319,6 +319,7 @@ typedef struct modem_info {
   int                   online;          /* 1 = B-Channel is up, drop data */
 					 /* 2 = B-Channel is up, deliver d.*/
   int                   dialing;         /* Dial in progress or ATA        */
+  int                   closing;
   int                   rcvsched;        /* Receive needs schedule         */
   int                   isdn_driver;	 /* Index to isdn-driver           */
   int                   isdn_channel;    /* Index to isdn-channel          */
-- 
2.6.3

[PATCH 3/3] tty: Remove ASYNC_CLOSING

[Peter Hurley]

The tty core no longer provides nor uses ASYNC_CLOSING; remove from
tty_port_close_start() and tty_port_close_end() as well as tty drivers
which open-code these state changes. Unfortunately, even though the
bit is masked from userspace, its inclusion in a uapi header precludes
removing the macro.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: linux-cris-kernel@axis.com
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 drivers/s390/char/con3215.c      | 3 +--
 drivers/tty/rocket.c             | 2 +-
 drivers/tty/serial/68328serial.c | 3 +--
 drivers/tty/serial/crisv10.c     | 3 +--
 drivers/tty/serial/serial_core.c | 1 -
 drivers/tty/tty_port.c           | 3 +--
 net/irda/ircomm/ircomm_tty.c     | 4 ----
 7 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 715251d..057d197 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -643,7 +643,6 @@ static void raw3215_shutdown(struct raw3215_info *raw)
 	if ((raw->flags & RAW3215_WORKING) ||
 	    raw->queued_write != NULL ||
 	    raw->queued_read != NULL) {
-		raw->port.flags |= ASYNC_CLOSING;
 		add_wait_queue(&raw->empty_wait, &wait);
 		set_current_state(TASK_INTERRUPTIBLE);
 		spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
@@ -651,7 +650,7 @@ static void raw3215_shutdown(struct raw3215_info *raw)
 		spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 		remove_wait_queue(&raw->empty_wait, &wait);
 		set_current_state(TASK_RUNNING);
-		raw->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING);
+		raw->port.flags &= ~ASYNC_INITIALIZED;
 	}
 	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c
index b575f05..7a3a1b6 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c
@@ -1040,7 +1040,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 		}
 	}
 	spin_lock_irq(&port->lock);
-	info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE);
+	info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_NORMAL_ACTIVE);
 	spin_unlock_irq(&port->lock);
 	mutex_unlock(&port->mutex);
 	tty_port_tty_set(port, NULL);
diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
index a190a37..dd1bd3c 100644
--- a/drivers/tty/serial/68328serial.c
+++ b/drivers/tty/serial/68328serial.c
@@ -1030,7 +1030,6 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
 		local_irq_restore(flags);
 		return;
 	}
-	port->flags |= ASYNC_CLOSING;
 	/*
 	 * Now we wait for the transmit buffer to clear; and we notify 
 	 * the line discipline to only process XON/XOFF characters.
@@ -1059,7 +1058,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
 			msleep_interruptible(jiffies_to_msecs(port->close_delay));
 		wake_up_interruptible(&port->open_wait);
 	}
-	port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+	port->flags &= ~ASYNC_NORMAL_ACTIVE;
 	local_irq_restore(flags);
 }
 
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index 5f2bd78..0b7dd09 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -3613,7 +3613,6 @@ rs_close(struct tty_struct *tty, struct file * filp)
 		local_irq_restore(flags);
 		return;
 	}
-	info->port.flags |= ASYNC_CLOSING;
 	/*
 	 * Now we wait for the transmit buffer to clear; and we notify
 	 * the line discipline to only process XON/XOFF characters.
@@ -3651,7 +3650,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
 			schedule_timeout_interruptible(info->port.close_delay);
 		wake_up_interruptible(&info->port.open_wait);
 	}
-	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
 	local_irq_restore(flags);
 
 	/* port closed */
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 418587f..cbf36df 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1434,7 +1434,6 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
 	 * Wake up anyone trying to open this port.
 	 */
 	clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
-	clear_bit(ASYNCB_CLOSING, &port->flags);
 	spin_unlock_irq(&port->lock);
 	wake_up_interruptible(&port->open_wait);
 
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 1fd07ef..ca5c119 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -476,7 +476,6 @@ int tty_port_close_start(struct tty_port *port,
 		spin_unlock_irqrestore(&port->lock, flags);
 		return 0;
 	}
-	set_bit(ASYNCB_CLOSING, &port->flags);
 	spin_unlock_irqrestore(&port->lock, flags);
 
 	tty_ldisc_closing(tty);
@@ -514,7 +513,7 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
 		spin_lock_irqsave(&port->lock, flags);
 		wake_up_interruptible(&port->open_wait);
 	}
-	port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	port->flags &= ~ASYNC_NORMAL_ACTIVE;
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 EXPORT_SYMBOL(tty_port_close_end);
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index a423770..db4d38c 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -1268,10 +1268,6 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m)
 		seq_printf(m, "%cASYNC_LOW_LATENCY", sep);
 		sep = '|';
 	}
-	if (self->port.flags & ASYNC_CLOSING) {
-		seq_printf(m, "%cASYNC_CLOSING", sep);
-		sep = '|';
-	}
 	if (self->port.flags & ASYNC_NORMAL_ACTIVE) {
 		seq_printf(m, "%cASYNC_NORMAL_ACTIVE", sep);
 		sep = '|';
-- 
2.6.3

[PATCH v2 0/3] Remove ASYNC_CLOSING

[Peter Hurley]

Changes for v2: rebased on top of tty-next

Hi Greg,

This series removes ASYNC_CLOSING from kernel use. However, the definition
is in a uapi header so I think it needs to stay.

The mxser driver used ASYNC_CLOSING to purge its fifo _with each
byte received_ while closing. This is clearly unnecessary but the
hangup/shutdown sequence in that driver is spaghetti and I don't have
the hardware to test (what I would consider to be) the proper fix:
cleaning up its hangup/shutdown so that clearing the fifo can be
done once in shutdown.

The isdn subsystem used ASYNC_CLOSING for unclear purposes; the
immediate effect was to prevent sending AT commands from the
emulator, but its not clear why that's necessary when closing.
Since idsn does not use the tty_port helpers, I simply added
to isdn the equivalent of an ASYNC_CLOSING flag.

Regards,

Peter Hurley (3):
  tty: mxser: Remove ASYNC_CLOSING
  isdn: Remove ASYNC_CLOSING
  tty: Remove ASYNC_CLOSING

 drivers/isdn/i4l/isdn_tty.c      | 12 ++++++------
 drivers/s390/char/con3215.c      |  3 +--
 drivers/tty/mxser.c              |  9 +++++----
 drivers/tty/rocket.c             |  2 +-
 drivers/tty/serial/68328serial.c |  3 +--
 drivers/tty/serial/crisv10.c     |  3 +--
 drivers/tty/serial/serial_core.c |  1 -
 drivers/tty/tty_port.c           |  3 +--
 include/linux/isdn.h             |  1 +
 net/irda/ircomm/ircomm_tty.c     |  4 ----
 10 files changed, 17 insertions(+), 24 deletions(-)

-- 
2.7.0

[PATCH v2 1/3] tty: mxser: Remove ASYNC_CLOSING

[Peter Hurley]

The tty core no longer provides ASYNC_CLOSING. Use private flag for
same purpose, which is to clear the fifos at each and every interrupt
during driver close(). The driver uses this sledgehammer approach because
its close/shutdown sequence is hopelessly borked.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 drivers/tty/mxser.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index e9600ce..9a0791e 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -254,6 +254,7 @@ struct mxser_port {
 	int xmit_head;
 	int xmit_tail;
 	int xmit_cnt;
+	int closing;
 
 	struct ktermios normal_termios;
 
@@ -1081,6 +1082,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 		return;
 	if (tty_port_close_start(port, tty, filp) == 0)
 		return;
+	info->closing = 1;
 	mutex_lock(&port->mutex);
 	mxser_close_port(port);
 	mxser_flush_buffer(tty);
@@ -1091,6 +1093,7 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
 	mxser_shutdown_port(port);
 	clear_bit(ASYNCB_INITIALIZED, &port->flags);
 	mutex_unlock(&port->mutex);
+	info->closing = 0;
 	/* Right now the tty_port set is done outside of the close_end helper
 	   as we don't yet have everyone using refcounts */	
 	tty_port_close_end(port, tty);
@@ -2253,10 +2256,8 @@ static irqreturn_t mxser_interrupt(int irq, void *dev_id)
 					break;
 				iir &= MOXA_MUST_IIR_MASK;
 				tty = tty_port_tty_get(&port->port);
-				if (!tty ||
-						(port->port.flags & ASYNC_CLOSING) ||
-						!(port->port.flags &
-							ASYNC_INITIALIZED)) {
+				if (!tty || port->closing ||
+				    !(port->port.flags & ASYNC_INITIALIZED)) {
 					status = inb(port->ioaddr + UART_LSR);
 					outb(0x27, port->ioaddr + UART_FCR);
 					inb(port->ioaddr + UART_MSR);
-- 
2.7.0

[PATCH v2 2/3] isdn: Remove ASYNC_CLOSING

[Peter Hurley]

The tty core no longer provides ASYNC_CLOSING. Use private flag for
same purpose, which is to disable AT-emulator output (why this is
necessary is not clear).

Cc: Karsten Keil <isdn@linux-pingi.de>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 drivers/isdn/i4l/isdn_tty.c | 12 ++++++------
 include/linux/isdn.h        |  1 +
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index 1a53b93..1dad65d 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1572,7 +1572,7 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
 #endif
 		return;
 	}
-	port->flags |= ASYNC_CLOSING;
+	info->closing = 1;
 
 	tty->closing = 1;
 	/*
@@ -1603,6 +1603,7 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
 	info->ncarrier = 0;
 
 	tty_port_close_end(port, tty);
+	info->closing = 0;
 #ifdef ISDN_DEBUG_MODEM_OPEN
 	printk(KERN_DEBUG "isdn_tty_close normal exit\n");
 #endif
@@ -2236,7 +2237,7 @@ isdn_tty_at_cout(char *msg, modem_info *info)
 	l = strlen(msg);
 
 	spin_lock_irqsave(&info->readlock, flags);
-	if (port->flags & ASYNC_CLOSING) {
+	if (info->closing) {
 		spin_unlock_irqrestore(&info->readlock, flags);
 		return;
 	}
@@ -2386,13 +2387,12 @@ isdn_tty_modem_result(int code, modem_info *info)
 	case RESULT_NO_CARRIER:
 #ifdef ISDN_DEBUG_MODEM_HUP
 		printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
-		       (info->port.flags & ASYNC_CLOSING),
-		       (!info->port.tty));
+		       info->closing, !info->port.tty);
 #endif
 		m->mdmreg[REG_RINGCNT] = 0;
 		del_timer(&info->nc_timer);
 		info->ncarrier = 0;
-		if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
+		if (info->closing || !info->port.tty)
 			return;
 
 #ifdef CONFIG_ISDN_AUDIO
@@ -2525,7 +2525,7 @@ isdn_tty_modem_result(int code, modem_info *info)
 		}
 	}
 	if (code == RESULT_NO_CARRIER) {
-		if ((info->port.flags & ASYNC_CLOSING) || (!info->port.tty))
+		if (info->closing || (!info->port.tty))
 			return;
 
 		if (info->port.flags & ASYNC_CHECK_CD)
diff --git a/include/linux/isdn.h b/include/linux/isdn.h
index 1e9a0f2..df97c84 100644
--- a/include/linux/isdn.h
+++ b/include/linux/isdn.h
@@ -319,6 +319,7 @@ typedef struct modem_info {
   int                   online;          /* 1 = B-Channel is up, drop data */
 					 /* 2 = B-Channel is up, deliver d.*/
   int                   dialing;         /* Dial in progress or ATA        */
+  int                   closing;
   int                   rcvsched;        /* Receive needs schedule         */
   int                   isdn_driver;	 /* Index to isdn-driver           */
   int                   isdn_channel;    /* Index to isdn-channel          */
-- 
2.7.0

[PATCH v2 3/3] tty: Remove ASYNC_CLOSING

[Peter Hurley]

The tty core no longer provides nor uses ASYNC_CLOSING; remove from
tty_port_close_start() and tty_port_close_end() as well as tty drivers
which open-code these state changes. Unfortunately, even though the
bit is masked from userspace, its inclusion in a uapi header precludes
removing the macro.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux-s390@vger.kernel.org
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: linux-cris-kernel@axis.com
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 drivers/s390/char/con3215.c      | 3 +--
 drivers/tty/rocket.c             | 2 +-
 drivers/tty/serial/68328serial.c | 3 +--
 drivers/tty/serial/crisv10.c     | 3 +--
 drivers/tty/serial/serial_core.c | 1 -
 drivers/tty/tty_port.c           | 3 +--
 net/irda/ircomm/ircomm_tty.c     | 4 ----
 7 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 0fc3fe5..d19d030 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -643,7 +643,6 @@ static void raw3215_shutdown(struct raw3215_info *raw)
 	if ((raw->flags & RAW3215_WORKING) ||
 	    raw->queued_write != NULL ||
 	    raw->queued_read != NULL) {
-		raw->port.flags |= ASYNC_CLOSING;
 		add_wait_queue(&raw->empty_wait, &wait);
 		set_current_state(TASK_INTERRUPTIBLE);
 		spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
@@ -651,7 +650,7 @@ static void raw3215_shutdown(struct raw3215_info *raw)
 		spin_lock_irqsave(get_ccwdev_lock(raw->cdev), flags);
 		remove_wait_queue(&raw->empty_wait, &wait);
 		set_current_state(TASK_RUNNING);
-		raw->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING);
+		raw->port.flags &= ~ASYNC_INITIALIZED;
 	}
 	spin_unlock_irqrestore(get_ccwdev_lock(raw->cdev), flags);
 }
diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c
index 2ab3b6f..0b802cd 100644
--- a/drivers/tty/rocket.c
+++ b/drivers/tty/rocket.c
@@ -1042,7 +1042,7 @@ static void rp_close(struct tty_struct *tty, struct file *filp)
 		}
 	}
 	spin_lock_irq(&port->lock);
-	info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE);
+	info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_NORMAL_ACTIVE);
 	tty->closing = 0;
 	spin_unlock_irq(&port->lock);
 	mutex_unlock(&port->mutex);
diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c
index 3804b41..81c3cd9 100644
--- a/drivers/tty/serial/68328serial.c
+++ b/drivers/tty/serial/68328serial.c
@@ -1028,7 +1028,6 @@ static void rs_close(struct tty_struct *tty, struct file *filp)
 		local_irq_restore(flags);
 		return;
 	}
-	port->flags |= ASYNC_CLOSING;
 	/*
 	 * Now we wait for the transmit buffer to clear; and we notify 
 	 * the line discipline to only process XON/XOFF characters.
@@ -1058,7 +1057,7 @@ static void rs_close(struct tty_struct *tty, struct file *filp)
 			msleep_interruptible(jiffies_to_msecs(port->close_delay));
 		wake_up_interruptible(&port->open_wait);
 	}
-	port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+	port->flags &= ~ASYNC_NORMAL_ACTIVE;
 	local_irq_restore(flags);
 }
 
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index df740c5..8e10172 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -3610,7 +3610,6 @@ rs_close(struct tty_struct *tty, struct file * filp)
 		local_irq_restore(flags);
 		return;
 	}
-	info->port.flags |= ASYNC_CLOSING;
 	/*
 	 * Now we wait for the transmit buffer to clear; and we notify
 	 * the line discipline to only process XON/XOFF characters.
@@ -3649,7 +3648,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
 			schedule_timeout_interruptible(info->port.close_delay);
 		wake_up_interruptible(&info->port.open_wait);
 	}
-	info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
 	local_irq_restore(flags);
 
 	/* port closed */
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 0baa231..bdff7fe 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1423,7 +1423,6 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
 	 * Wake up anyone trying to open this port.
 	 */
 	clear_bit(ASYNCB_NORMAL_ACTIVE, &port->flags);
-	clear_bit(ASYNCB_CLOSING, &port->flags);
 	spin_unlock_irq(&port->lock);
 	wake_up_interruptible(&port->open_wait);
 
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 1fbba8e..101a8c2 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -476,7 +476,6 @@ int tty_port_close_start(struct tty_port *port,
 		spin_unlock_irqrestore(&port->lock, flags);
 		return 0;
 	}
-	set_bit(ASYNCB_CLOSING, &port->flags);
 	spin_unlock_irqrestore(&port->lock, flags);
 
 	tty->closing = 1;
@@ -515,7 +514,7 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty)
 		spin_lock_irqsave(&port->lock, flags);
 		wake_up_interruptible(&port->open_wait);
 	}
-	port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
+	port->flags &= ~ASYNC_NORMAL_ACTIVE;
 	spin_unlock_irqrestore(&port->lock, flags);
 }
 EXPORT_SYMBOL(tty_port_close_end);
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 1776fe5..da126ee 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -1267,10 +1267,6 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m)
 		seq_printf(m, "%cASYNC_LOW_LATENCY", sep);
 		sep = '|';
 	}
-	if (self->port.flags & ASYNC_CLOSING) {
-		seq_printf(m, "%cASYNC_CLOSING", sep);
-		sep = '|';
-	}
 	if (self->port.flags & ASYNC_NORMAL_ACTIVE) {
 		seq_printf(m, "%cASYNC_NORMAL_ACTIVE", sep);
 		sep = '|';
-- 
2.7.0