[PATCH] USB: cleanup of usblp (release and poll)

this cleans up locking and freeing in usblp_release and
poll.

drivers/usb/class/usblp.c

@@ -383,7 +383,7 @@ static void usblp_cleanup (struct usblp *usblp)
 	usb_buffer_free (usblp->dev, USBLP_BUF_SIZE,
 			usblp->writebuf, usblp->writeurb->transfer_dma);
 	usb_buffer_free (usblp->dev, USBLP_BUF_SIZE,
-			usblp->readbuf, usblp->writeurb->transfer_dma);
+			usblp->readbuf, usblp->readurb->transfer_dma);
 	kfree (usblp->device_id_string);
 	kfree (usblp->statusbuf);
 	usb_free_urb(usblp->writeurb);
@@ -403,14 +403,12 @@ static int usblp_release(struct inode *inode, struct file *file)
 	struct usblp *usblp = file->private_data;
 
 	down (&usblp->sem);
-	lock_kernel();
 	usblp->used = 0;
 	if (usblp->present) {
 		usblp_unlink_urbs(usblp);
 		up(&usblp->sem);
 	} else 		/* finish cleanup from disconnect */
 		usblp_cleanup (usblp);
-	unlock_kernel();
 	return 0;
 }
 
@@ -419,8 +417,8 @@ static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait
 {
 	struct usblp *usblp = file->private_data;
 	poll_wait(file, &usblp->wait, wait);
- 	return ((!usblp->bidir || usblp->readurb->status  == -EINPROGRESS) ? 0 : POLLIN  | POLLRDNORM)
- 			       | (usblp->writeurb->status == -EINPROGRESS  ? 0 : POLLOUT | POLLWRNORM);
+ 	return ((!usblp->bidir || !usblp->rcomplete) ? 0 : POLLIN  | POLLRDNORM)
+ 			       | (!usblp->wcomplete ? 0 : POLLOUT | POLLWRNORM);
 }
 
 static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)