[GIT PATCH] TTY fixes for .36-rc2

[GIT PATCH] TTY fixes for .36-rc2

[Greg KH]

Here are some tty and serial driver bugfixes for the .36-rc2 kernel.

Some fixes due to the BKL removal fallout, and other minor things.

Please pull from:
	master.kernel.org:/pub/scm/linux/kernel/git/gregkh/tty-2.6.git/

These patches have been in the linux-next tree and -mm for a while now.

Patches will be sent to the linux-kernel mailing list, if anyone wants
to see them.

thanks,

greg k-h

------------

 drivers/char/ip2/ip2main.c   |    4 +++-
 drivers/char/rocket.c        |    1 +
 drivers/char/synclink_gt.c   |    4 +++-
 drivers/serial/68328serial.c |   29 +++++++++++------------------
 drivers/serial/8250_early.c  |    4 ++--
 5 files changed, 20 insertions(+), 22 deletions(-)

---------------

Dan Carpenter (4):
      ip2: remove unneeded NULL check
      ip2: return -EFAULT on copy_to_user errors
      rocket: add a mutex_unlock()
      synclink: add mutex_unlock() on error path

Kulikov Vasiliy (1):
      68328serial: check return value of copy_*_user() instead of access_ok()

Tony Luck (1):
      serial: print early console device address in hex

[PATCH 1/6] serial: print early console device address in hex

[Greg Kroah-Hartman]

From: Luck, Tony <tony.luck@intel.com>

Device addresses are usually printed in hex.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/serial/8250_early.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/serial/8250_early.c b/drivers/serial/8250_early.c
index b745792..eaafb98 100644
--- a/drivers/serial/8250_early.c
+++ b/drivers/serial/8250_early.c
@@ -203,13 +203,13 @@ static int __init parse_options(struct early_serial8250_device *device,
 
 	if (mmio || mmio32)
 		printk(KERN_INFO
-		       "Early serial console at MMIO%s 0x%llu (options '%s')\n",
+		       "Early serial console at MMIO%s 0x%llx (options '%s')\n",
 			mmio32 ? "32" : "",
 			(unsigned long long)port->mapbase,
 			device->options);
 	else
 		printk(KERN_INFO
-		      "Early serial console at I/O port 0x%lu (options '%s')\n",
+		      "Early serial console at I/O port 0x%lx (options '%s')\n",
 			port->iobase,
 			device->options);
 
-- 
1.7.2

[PATCH 2/6] ip2: remove unneeded NULL check

[Greg Kroah-Hartman]

From: Dan Carpenter <error27@gmail.com>

We don't pass NULL tty pointers to the close function, and anyway we
already dereferenced it at this point.  This check can be removed.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Cc: "Michael H. Warfield" <mhw@wittsend.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/char/ip2/ip2main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 07f3ea3..8fa041e 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -1650,7 +1650,7 @@ ip2_close( PTTY tty, struct file *pFile )
 	/* disable DSS reporting */
 	i2QueueCommands(PTYPE_INLINE, pCh, 100, 4,
 				CMD_DCD_NREP, CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
-	if ( !tty || (tty->termios->c_cflag & HUPCL) ) {
+	if (tty->termios->c_cflag & HUPCL) {
 		i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
 		pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
 		i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
-- 
1.7.2

[PATCH 3/6] ip2: return -EFAULT on copy_to_user errors

[Greg Kroah-Hartman]

From: Dan Carpenter <error27@gmail.com>

copy_to_user() returns the number of bytes remaining but we want to return
a negative error code on errors.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Cc: "Michael H. Warfield" <mhw@wittsend.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/char/ip2/ip2main.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 8fa041e..d4b71e8 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -2930,6 +2930,8 @@ ip2_ipl_ioctl (struct file *pFile, UINT cmd, ULONG arg )
 				if ( pCh )
 				{
 					rc = copy_to_user(argp, pCh, sizeof(i2ChanStr));
+					if (rc)
+						rc = -EFAULT;
 				} else {
 					rc = -ENODEV;
 				}
-- 
1.7.2

[PATCH 4/6] rocket: add a mutex_unlock()

[Greg Kroah-Hartman]

From: Dan Carpenter <error27@gmail.com>

This path needs a mutex_unlock().  This is stuff from the bkl to mutex
transition.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/char/rocket.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 79c3bc6..7c79d24 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -1244,6 +1244,7 @@ static int set_config(struct tty_struct *tty, struct r_port *info,
 		}
 		info->flags = ((info->flags & ~ROCKET_USR_MASK) | (new_serial.flags & ROCKET_USR_MASK));
 		configure_r_port(tty, info, NULL);
+		mutex_unlock(&info->port.mutex);
 		return 0;
 	}
 
-- 
1.7.2

[PATCH 5/6] synclink: add mutex_unlock() on error path

[Greg Kroah-Hartman]

From: Dan Carpenter <error27@gmail.com>

There is a path which still holds its mutex here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/char/synclink_gt.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index fef80cf..e63b830 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -691,8 +691,10 @@ static int open(struct tty_struct *tty, struct file *filp)
 	if (info->port.count == 1) {
 		/* 1st open on this device, init hardware */
 		retval = startup(info);
-		if (retval < 0)
+		if (retval < 0) {
+			mutex_unlock(&info->port.mutex);
 			goto cleanup;
+		}
 	}
 	mutex_unlock(&info->port.mutex);
 	retval = block_til_ready(tty, filp, info);
-- 
1.7.2

[PATCH 6/6] 68328serial: check return value of copy_*_user() instead of access_ok()

[Greg Kroah-Hartman]

From: Kulikov Vasiliy <segooon@gmail.com>

As copy_*_user() calls access_ok() it should not be called explicitly.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/serial/68328serial.c |   29 +++++++++++------------------
 1 files changed, 11 insertions(+), 18 deletions(-)

diff --git a/drivers/serial/68328serial.c b/drivers/serial/68328serial.c
index 7356a56..be0ebce 100644
--- a/drivers/serial/68328serial.c
+++ b/drivers/serial/68328serial.c
@@ -869,7 +869,9 @@ static int get_serial_info(struct m68k_serial * info,
 	tmp.close_delay = info->close_delay;
 	tmp.closing_wait = info->closing_wait;
 	tmp.custom_divisor = info->custom_divisor;
-	copy_to_user(retinfo,&tmp,sizeof(*retinfo));
+	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+		return -EFAULT;
+
 	return 0;
 }
 
@@ -882,7 +884,8 @@ static int set_serial_info(struct m68k_serial * info,
 
 	if (!new_info)
 		return -EFAULT;
-	copy_from_user(&new_serial,new_info,sizeof(new_serial));
+	if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+		return -EFAULT;
 	old_info = *info;
 
 	if (!capable(CAP_SYS_ADMIN)) {
@@ -943,8 +946,7 @@ static int get_lsr_info(struct m68k_serial * info, unsigned int *value)
 	status = 0;
 #endif
 	local_irq_restore(flags);
-	put_user(status,value);
-	return 0;
+	return put_user(status, value);
 }
 
 /*
@@ -999,27 +1001,18 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
 			send_break(info, arg ? arg*(100) : 250);
 			return 0;
 		case TIOCGSERIAL:
-			if (access_ok(VERIFY_WRITE, (void *) arg,
-						sizeof(struct serial_struct)))
-				return get_serial_info(info,
-					       (struct serial_struct *) arg);
-			return -EFAULT;
+			return get_serial_info(info,
+				       (struct serial_struct *) arg);
 		case TIOCSSERIAL:
 			return set_serial_info(info,
 					       (struct serial_struct *) arg);
 		case TIOCSERGETLSR: /* Get line status register */
-			if (access_ok(VERIFY_WRITE, (void *) arg,
-						sizeof(unsigned int)))
-				return get_lsr_info(info, (unsigned int *) arg);
-			return -EFAULT;
+			return get_lsr_info(info, (unsigned int *) arg);
 		case TIOCSERGSTRUCT:
-			if (!access_ok(VERIFY_WRITE, (void *) arg,
-						sizeof(struct m68k_serial)))
+			if (copy_to_user((struct m68k_serial *) arg,
+				    info, sizeof(struct m68k_serial)))
 				return -EFAULT;
-			copy_to_user((struct m68k_serial *) arg,
-				    info, sizeof(struct m68k_serial));
 			return 0;
-			
 		default:
 			return -ENOIOCTLCMD;
 		}
-- 
1.7.2