VServer 1.9.2 (patch-2.6.8.1-vs1.9.2.diff)

[linux-2.6.git] / drivers / char / dtlk.c

diff --git a/drivers/char/dtlk.c b/drivers/char/dtlk.c
index 8febd41..e8f15f4 100644 (file)
--- a/drivers/char/dtlk.c
+++ b/drivers/char/dtlk.c
@@ -85,9 +85,9 @@ static wait_queue_head_t dtlk_process_list;
 static struct timer_list dtlk_timer;
 
 /* prototypes for file_operations struct */
-static ssize_t dtlk_read(struct file *, char *,
+static ssize_t dtlk_read(struct file *, char __user *,
                         size_t nbytes, loff_t * ppos);
-static ssize_t dtlk_write(struct file *, const char *,
+static ssize_t dtlk_write(struct file *, const char __user *,
                          size_t nbytes, loff_t * ppos);
 static unsigned int dtlk_poll(struct file *, poll_table *);
 static int dtlk_open(struct inode *, struct file *);
@@ -121,17 +121,13 @@ static char dtlk_write_tts(char);
  */
 static void dtlk_timer_tick(unsigned long data);
 
-static ssize_t dtlk_read(struct file *file, char *buf,
+static ssize_t dtlk_read(struct file *file, char __user *buf,
                         size_t count, loff_t * ppos)
 {
        unsigned int minor = iminor(file->f_dentry->d_inode);
        char ch;
        int i = 0, retries;
 
-       /* Can't seek (pread) on the DoubleTalk.  */
-       if (ppos != &file->f_pos)
-               return -ESPIPE;
-
        TRACE_TEXT("(dtlk_read");
        /*  printk("DoubleTalk PC - dtlk_read()\n"); */
 
@@ -158,7 +154,7 @@ static ssize_t dtlk_read(struct file *file, char *buf,
        return -EAGAIN;
 }
 
-static ssize_t dtlk_write(struct file *file, const char *buf,
+static ssize_t dtlk_write(struct file *file, const char __user *buf,
                          size_t count, loff_t * ppos)
 {
        int i = 0, retries = 0, ch;
@@ -180,10 +176,6 @@ static ssize_t dtlk_write(struct file *file, const char *buf,
        }
 #endif
 
-       /* Can't seek (pwrite) on the DoubleTalk.  */
-       if (ppos != &file->f_pos)
-               return -ESPIPE;
-
        if (iminor(file->f_dentry->d_inode) != DTLK_MINOR)
                return -EINVAL;
 
@@ -277,6 +269,7 @@ static int dtlk_ioctl(struct inode *inode,
                      unsigned int cmd,
                      unsigned long arg)
 {
+       char __user *argp = (char __user *)arg;
        struct dtlk_settings *sp;
        char portval;
        TRACE_TEXT(" dtlk_ioctl");
@@ -285,14 +278,13 @@ static int dtlk_ioctl(struct inode *inode,
 
        case DTLK_INTERROGATE:
                sp = dtlk_interrogate();
-               if (copy_to_user((char *) arg, (char *) sp,
-                                  sizeof(struct dtlk_settings)))
+               if (copy_to_user(argp, sp, sizeof(struct dtlk_settings)))
                        return -EINVAL;
                return 0;
 
        case DTLK_STATUS:
                portval = inb_p(dtlk_port_tts);
-               return put_user(portval, (char *) arg);
+               return put_user(portval, argp);
 
        default:
                return -EINVAL;
@@ -303,11 +295,12 @@ static int dtlk_open(struct inode *inode, struct file *file)
 {
        TRACE_TEXT("(dtlk_open");
 
+       nonseekable_open(inode, file);
        switch (iminor(inode)) {
        case DTLK_MINOR:
                if (dtlk_busy)
                        return -EBUSY;
-               return 0;
+               return nonseekable_open(inode, file);
 
        default:
                return -ENXIO;