Fix up a couple of drivers - notable sg - for nonseekability.

drivers/char/ds1620.c

@@ -218,10 +218,6 @@ ds1620_read(struct file *file, char *buf, size_t count, loff_t *ptr)
 	signed int cur_temp;
 	signed char cur_temp_degF;
 
-	/* Can't seek (pread) on this device */
-	if (ptr != &file->f_pos)
-		return -ESPIPE;
-
 	cur_temp = cvt_9_to_int(ds1620_in(THERM_READ_TEMP, 9)) >> 1;
 
 	/* convert to Fahrenheit, as per wdt.c */
@@ -338,6 +334,7 @@ static struct proc_dir_entry *proc_therm_ds1620;
 
 static struct file_operations ds1620_fops = {
 	.owner		= THIS_MODULE,
+	.open		= nonseekable_open,
 	.read		= ds1620_read,
 	.ioctl		= ds1620_ioctl,
 };

drivers/char/dtlk.c

@@ -128,10 +128,6 @@ static ssize_t dtlk_read(struct file *file, char __user *buf,
 	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"); */
 
@@ -303,6 +299,7 @@ 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)

drivers/scsi/sg.c

@@ -234,6 +234,7 @@ sg_open(struct inode *inode, struct file *filp)
 	int res;
 	int retval;
 
+	nonseekable_open(inode, filp);
 	SCSI_LOG_TIMEOUT(3, printk("sg_open: dev=%d, flags=0x%x\n", dev, flags));
 	sdp = sg_get_dev(dev);
 	if ((!sdp) || (!sdp->device))
@@ -343,7 +344,6 @@ sg_read(struct file *filp, char __user *buf, size_t count, loff_t * ppos)
 		return -ENXIO;
 	SCSI_LOG_TIMEOUT(3, printk("sg_read: %s, count=%d\n",
 				   sdp->disk->disk_name, (int) count));
-	if (ppos != &filp->f_pos) ;	/* FIXME: Hmm.  Seek to the right place, or fail?  */
 	if ((k = verify_area(VERIFY_WRITE, buf, count)))
 		return k;
 	if (sfp->force_packid && (count >= SZ_SG_HEADER)) {
@@ -501,7 +501,6 @@ sg_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
 	if (!((filp->f_flags & O_NONBLOCK) ||
 	      scsi_block_when_processing_errors(sdp->device)))
 		return -ENXIO;
-	if (ppos != &filp->f_pos) ;	/* FIXME: Hmm.  Seek to the right place, or fail?  */
 
 	if ((k = verify_area(VERIFY_READ, buf, count)))
 		return k;	/* protects following copy_from_user()s + get_user()s */