Staging: dt3155: fix different address spaces noise in dt3155_drv.c

This fixes the different address spaces noise when copying data to/from
user space to kernel space.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/dt3155/dt3155_drv.c b/drivers/staging/dt3155/dt3155_drv.c
index 40ef97f3feb5360431e3a66d9508e2e821f62d68..3024d35ed348fdbb0f209cbfa2e3c64a8e20c3ac 100644 (file)
--- a/drivers/staging/dt3155/dt3155_drv.c
+++ b/drivers/staging/dt3155/dt3155_drv.c
@@ -521,6 +521,7 @@ static int dt3155_ioctl(struct inode *inode,
                        unsigned long arg)
 {
   int minor = MINOR(inode->i_rdev); /* What device are we ioctl()'ing? */
+  void __user *up = (void __user *)arg;
 
   if (minor >= MAXBOARDS || minor < 0)
     return -ENODEV;
@@ -547,7 +548,7 @@ static int dt3155_ioctl(struct inode *inode,
 
        {
          struct dt3155_config tmp;
-         if (copy_from_user((void *)&tmp, (void *) arg, sizeof(tmp)))
+         if (copy_from_user(&tmp, up, sizeof(tmp)))
              return -EFAULT;
          /* check for valid settings */
          if (tmp.rows > DT3155_MAX_ROWS ||
@@ -565,7 +566,7 @@ static int dt3155_ioctl(struct inode *inode,
       }
     case DT3155_GET_CONFIG:
       {
-       if (copy_to_user((void *) arg, (void *) &dt3155_status[minor],
+       if (copy_to_user(up, &dt3155_status[minor],
                     sizeof(struct dt3155_status)))
            return -EFAULT;
        return 0;
@@ -586,7 +587,7 @@ static int dt3155_ioctl(struct inode *inode,
          return 0;
 
        quick_stop(minor);
-       if (copy_to_user((void *) arg, (void *) &dt3155_status[minor],
+       if (copy_to_user(up, &dt3155_status[minor],
                     sizeof(struct dt3155_status)))
            return -EFAULT;
        return 0;
@@ -610,7 +611,7 @@ static int dt3155_ioctl(struct inode *inode,
          }
 
        dt3155_init_isr(minor);
-       if (copy_to_user((void *) arg, (void *) &dt3155_status[minor],
+       if (copy_to_user(up, &dt3155_status[minor],
                      sizeof(struct dt3155_status)))
            return -EFAULT;
        return 0;
@@ -812,11 +813,11 @@ static ssize_t dt3155_read(struct file *filep, char __user *buf,
   /* make this an offset */
   offset = frame_info->addr - dt3155_status[minor].mem_addr;
 
-  put_user(offset, (unsigned int *) buf);
+  put_user(offset, (unsigned int __user *)buf);
   buf += sizeof(u32);
-  put_user(dt3155_status[minor].fbuffer.frame_count, (unsigned int *) buf);
+  put_user(dt3155_status[minor].fbuffer.frame_count, (unsigned int __user *)buf);
   buf += sizeof(u32);
-  put_user(dt3155_status[minor].state, (unsigned int *) buf);
+  put_user(dt3155_status[minor].state, (unsigned int __user *)buf);
   buf += sizeof(u32);
   if (copy_to_user(buf, frame_info, sizeof(*frame_info)))
       return -EFAULT;