9 files changed, 98 insertions, 46 deletions

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index ddf5def1b0da..710af89b176d 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -819,13 +819,16 @@ static const struct intel_driver_description {
             "Sandybridge", NULL, &intel_gen6_driver },
         { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_HB, PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_IG,
             "Sandybridge", NULL, &intel_gen6_driver },
+        { PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_HB, PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_D0_IG,
+            "Sandybridge", NULL, &intel_gen6_driver },
         { 0, 0, NULL, NULL, NULL }
 };
 
 static int __devinit intel_gmch_probe(struct pci_dev *pdev,
                                       struct agp_bridge_data *bridge)
 {
-        int i;
+        int i, mask;
+
         bridge->driver = NULL;
 
         for (i = 0; intel_agp_chipsets[i].name != NULL; i++) {
@@ -845,14 +848,19 @@ static int __devinit intel_gmch_probe(struct pci_dev *pdev,
 
         dev_info(&pdev->dev, "Intel %s Chipset\n", intel_agp_chipsets[i].name);
 
-        if (bridge->driver->mask_memory == intel_i965_mask_memory) {
-                if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(36)))
-                        dev_err(&intel_private.pcidev->dev,
-                                "set gfx device dma mask 36bit failed!\n");
-                else
-                        pci_set_consistent_dma_mask(intel_private.pcidev,
-                                                    DMA_BIT_MASK(36));
-        }
+        if (bridge->driver->mask_memory == intel_gen6_mask_memory)
+                mask = 40;
+        else if (bridge->driver->mask_memory == intel_i965_mask_memory)
+                mask = 36;
+        else
+                mask = 32;
+
+        if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask)))
+                dev_err(&intel_private.pcidev->dev,
+                        "set gfx device dma mask %d-bit failed!\n", mask);
+        else
+                pci_set_consistent_dma_mask(intel_private.pcidev,
+                                            DMA_BIT_MASK(mask));
 
         return 1;
 }
diff --git a/drivers/char/agp/intel-agp.h b/drivers/char/agp/intel-agp.h
index c05e3e518268..08d47532e605 100644
--- a/drivers/char/agp/intel-agp.h
+++ b/drivers/char/agp/intel-agp.h
@@ -204,6 +204,7 @@
 #define PCI_DEVICE_ID_INTEL_SANDYBRIDGE_IG  0x0102
 #define PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_HB  0x0104
 #define PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_IG  0x0106
+#define PCI_DEVICE_ID_INTEL_SANDYBRIDGE_M_D0_IG  0x0126
 
 /* cover 915 and 945 variants */
 #define IS_I915 (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_E7221_HB || \
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 07f3ea38b582..d4b71e8d0d23 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));
@@ -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;
                                 }
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index ad46eae1f9bb..c350d01716bd 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -675,8 +675,8 @@ static int ptmx_open(struct inode *inode, struct file *filp)
         }
 
         set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
-        filp->private_data = tty;
-        file_move(filp, &tty->tty_files);
+
+        tty_add_file(tty, filp);
 
         retval = devpts_pty_new(inode, tty->link);
         if (retval)
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index 79c3bc69165a..7c79d243acc9 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;
         }
 
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index fef80cfcab5c..e63b830c86cc 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);
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 0350c42375a2..949067a0bd47 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -136,6 +136,9 @@ LIST_HEAD(tty_drivers);			/* linked list of tty drivers */
 DEFINE_MUTEX(tty_mutex);
 EXPORT_SYMBOL(tty_mutex);
 
+/* Spinlock to protect the tty->tty_files list */
+DEFINE_SPINLOCK(tty_files_lock);
+
 static ssize_t tty_read(struct file *, char __user *, size_t, loff_t *);
 static ssize_t tty_write(struct file *, const char __user *, size_t, loff_t *);
 ssize_t redirected_tty_write(struct file *, const char __user *,
@@ -185,6 +188,41 @@ void free_tty_struct(struct tty_struct *tty)
         kfree(tty);
 }
 
+static inline struct tty_struct *file_tty(struct file *file)
+{
+        return ((struct tty_file_private *)file->private_data)->tty;
+}
+
+/* Associate a new file with the tty structure */
+void tty_add_file(struct tty_struct *tty, struct file *file)
+{
+        struct tty_file_private *priv;
+
+        /* XXX: must implement proper error handling in callers */
+        priv = kmalloc(sizeof(*priv), GFP_KERNEL|__GFP_NOFAIL);
+
+        priv->tty = tty;
+        priv->file = file;
+        file->private_data = priv;
+
+        spin_lock(&tty_files_lock);
+        list_add(&priv->list, &tty->tty_files);
+        spin_unlock(&tty_files_lock);
+}
+
+/* Delete file from its tty */
+void tty_del_file(struct file *file)
+{
+        struct tty_file_private *priv = file->private_data;
+
+        spin_lock(&tty_files_lock);
+        list_del(&priv->list);
+        spin_unlock(&tty_files_lock);
+        file->private_data = NULL;
+        kfree(priv);
+}
+
+
 #define TTY_NUMBER(tty) ((tty)->index + (tty)->driver->name_base)
 
 /**
@@ -235,11 +273,11 @@ static int check_tty_count(struct tty_struct *tty, const char *routine)
         struct list_head *p;
         int count = 0;
 
-        file_list_lock();
+        spin_lock(&tty_files_lock);
         list_for_each(p, &tty->tty_files) {
                 count++;
         }
-        file_list_unlock();
+        spin_unlock(&tty_files_lock);
         if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
             tty->driver->subtype == PTY_TYPE_SLAVE &&
             tty->link && tty->link->count)
@@ -497,6 +535,7 @@ void __tty_hangup(struct tty_struct *tty)
         struct file *cons_filp = NULL;
         struct file *filp, *f = NULL;
         struct task_struct *p;
+        struct tty_file_private *priv;
         int    closecount = 0, n;
         unsigned long flags;
         int refs = 0;
@@ -506,7 +545,7 @@ void __tty_hangup(struct tty_struct *tty)
 
 
         spin_lock(&redirect_lock);
-        if (redirect && redirect->private_data == tty) {
+        if (redirect && file_tty(redirect) == tty) {
                 f = redirect;
                 redirect = NULL;
         }
@@ -519,9 +558,10 @@ void __tty_hangup(struct tty_struct *tty)
            workqueue with the lock held */
         check_tty_count(tty, "tty_hangup");
 
-        file_list_lock();
+        spin_lock(&tty_files_lock);
         /* This breaks for file handles being sent over AF_UNIX sockets ? */
-        list_for_each_entry(filp, &tty->tty_files, f_u.fu_list) {
+        list_for_each_entry(priv, &tty->tty_files, list) {
+                filp = priv->file;
                 if (filp->f_op->write == redirected_tty_write)
                         cons_filp = filp;
                 if (filp->f_op->write != tty_write)
@@ -530,7 +570,7 @@ void __tty_hangup(struct tty_struct *tty)
                 __tty_fasync(-1, filp, 0);      /* can't block */
                 filp->f_op = &hung_up_tty_fops;
         }
-        file_list_unlock();
+        spin_unlock(&tty_files_lock);
 
         tty_ldisc_hangup(tty);
 
@@ -889,12 +929,10 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
                         loff_t *ppos)
 {
         int i;
-        struct tty_struct *tty;
-        struct inode *inode;
+        struct inode *inode = file->f_path.dentry->d_inode;
+        struct tty_struct *tty = file_tty(file);
         struct tty_ldisc *ld;
 
-        tty = file->private_data;
-        inode = file->f_path.dentry->d_inode;
         if (tty_paranoia_check(tty, inode, "tty_read"))
                 return -EIO;
         if (!tty || (test_bit(TTY_IO_ERROR, &tty->flags)))
@@ -1065,12 +1103,11 @@ void tty_write_message(struct tty_struct *tty, char *msg)
 static ssize_t tty_write(struct file *file, const char __user *buf,
                                                 size_t count, loff_t *ppos)
 {
-        struct tty_struct *tty;
         struct inode *inode = file->f_path.dentry->d_inode;
+        struct tty_struct *tty = file_tty(file);
+        struct tty_ldisc *ld;
         ssize_t ret;
-        struct tty_ldisc *ld;
 
-        tty = file->private_data;
         if (tty_paranoia_check(tty, inode, "tty_write"))
                 return -EIO;
         if (!tty || !tty->ops->write ||
@@ -1424,9 +1461,9 @@ static void release_one_tty(struct work_struct *work)
         tty_driver_kref_put(driver);
         module_put(driver->owner);
 
-        file_list_lock();
+        spin_lock(&tty_files_lock);
         list_del_init(&tty->tty_files);
-        file_list_unlock();
+        spin_unlock(&tty_files_lock);
 
         put_pid(tty->pgrp);
         put_pid(tty->session);
@@ -1507,13 +1544,13 @@ static void release_tty(struct tty_struct *tty, int idx)
 
 int tty_release(struct inode *inode, struct file *filp)
 {
-        struct tty_struct *tty, *o_tty;
+        struct tty_struct *tty = file_tty(filp);
+        struct tty_struct *o_tty;
         int     pty_master, tty_closing, o_tty_closing, do_sleep;
         int     devpts;
         int     idx;
         char    buf[64];
 
-        tty = filp->private_data;
         if (tty_paranoia_check(tty, inode, "tty_release_dev"))
                 return 0;
 
@@ -1671,8 +1708,7 @@ int tty_release(struct inode *inode, struct file *filp)
          *  - do_tty_hangup no longer sees this file descriptor as
          *    something that needs to be handled for hangups.
          */
-        file_kill(filp);
-        filp->private_data = NULL;
+        tty_del_file(filp);
 
         /*
          * Perform some housekeeping before deciding whether to return.
@@ -1839,8 +1875,8 @@ got_driver:
                 return PTR_ERR(tty);
         }
 
-        filp->private_data = tty;
-        file_move(filp, &tty->tty_files);
+        tty_add_file(tty, filp);
+
         check_tty_count(tty, "tty_open");
         if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
             tty->driver->subtype == PTY_TYPE_MASTER)
@@ -1916,11 +1952,10 @@ got_driver:
 
 static unsigned int tty_poll(struct file *filp, poll_table *wait)
 {
-        struct tty_struct *tty;
+        struct tty_struct *tty = file_tty(filp);
         struct tty_ldisc *ld;
         int ret = 0;
 
-        tty = filp->private_data;
         if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_poll"))
                 return 0;
 
@@ -1933,11 +1968,10 @@ static unsigned int tty_poll(struct file *filp, poll_table *wait)
 
 static int __tty_fasync(int fd, struct file *filp, int on)
 {
-        struct tty_struct *tty;
+        struct tty_struct *tty = file_tty(filp);
         unsigned long flags;
         int retval = 0;
 
-        tty = filp->private_data;
         if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync"))
                 goto out;
 
@@ -2491,13 +2525,13 @@ EXPORT_SYMBOL(tty_pair_get_pty);
  */
 long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-        struct tty_struct *tty, *real_tty;
+        struct tty_struct *tty = file_tty(file);
+        struct tty_struct *real_tty;
         void __user *p = (void __user *)arg;
         int retval;
         struct tty_ldisc *ld;
         struct inode *inode = file->f_dentry->d_inode;
 
-        tty = file->private_data;
         if (tty_paranoia_check(tty, inode, "tty_ioctl"))
                 return -EINVAL;
 
@@ -2619,7 +2653,7 @@ static long tty_compat_ioctl(struct file *file, unsigned int cmd,
                                 unsigned long arg)
 {
         struct inode *inode = file->f_dentry->d_inode;
-        struct tty_struct *tty = file->private_data;
+        struct tty_struct *tty = file_tty(file);
         struct tty_ldisc *ld;
         int retval = -ENOIOCTLCMD;
 
@@ -2711,7 +2745,7 @@ void __do_SAK(struct tty_struct *tty)
                                 if (!filp)
                                         continue;
                                 if (filp->f_op->read == tty_read &&
-                                    filp->private_data == tty) {
+                                    file_tty(filp) == tty) {
                                         printk(KERN_NOTICE "SAK: killed process %d"
                                             " (%s): fd#%d opened to the tty\n",
                                             task_pid_nr(p), p->comm, i);
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index c734f9b1263a..50590c7f2c01 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -194,10 +194,11 @@ static DECLARE_WORK(console_work, console_callback);
 int fg_console;
 int last_console;
 int want_console = -1;
-int saved_fg_console;
-int saved_last_console;
-int saved_want_console;
-int saved_vc_mode;
+static int saved_fg_console;
+static int saved_last_console;
+static int saved_want_console;
+static int saved_vc_mode;
+static int saved_console_blanked;
 
 /*
  * For each existing display, we have a pointer to console currently visible
@@ -3449,6 +3450,7 @@ int con_debug_enter(struct vc_data *vc)
         saved_last_console = last_console;
         saved_want_console = want_console;
         saved_vc_mode = vc->vc_mode;
+        saved_console_blanked = console_blanked;
         vc->vc_mode = KD_TEXT;
         console_blanked = 0;
         if (vc->vc_sw->con_debug_enter)
@@ -3492,6 +3494,7 @@ int con_debug_leave(void)
         fg_console = saved_fg_console;
         last_console = saved_last_console;
         want_console = saved_want_console;
+        console_blanked = saved_console_blanked;
         vc_cons[fg_console].d->vc_mode = saved_vc_mode;
 
         vc = vc_cons[fg_console].d;
diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
index 0ed763cd2e77..b663d573aad9 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
@@ -94,6 +94,7 @@
 
 #ifdef CONFIG_OF
 /* For open firmware. */
+#include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
 #endif