USB: legotower: use msecs_to_jiffies for time conversion

This is only an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var).

Signed-off-by: Nicholas Mc Guire <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/misc/legousbtower.c

···
 	}
 
 	if (read_timeout) {
-		timeout = jiffies + read_timeout * HZ / 1000;
+		timeout = jiffies + msecs_to_jiffies(read_timeout);
 	}
 
 	/* wait for data */
···
 		/* reset read timeout during read or write activity */
 		if (read_timeout
 		    && (dev->read_buffer_length || dev->interrupt_out_busy)) {
-			timeout = jiffies + read_timeout * HZ / 1000;
+			timeout = jiffies + msecs_to_jiffies(read_timeout);
 		}
 		/* check for read timeout */
 		if (read_timeout && time_after (jiffies, timeout)) {
···
 	dev->read_buffer_length = 0;
 	dev->read_packet_length = 0;
 	spin_lock_init (&dev->read_buffer_lock);
-	dev->packet_timeout_jiffies = packet_timeout * HZ / 1000;
+	dev->packet_timeout_jiffies = msecs_to_jiffies(packet_timeout);
 	dev->read_last_arrival = jiffies;
 
 	init_waitqueue_head (&dev->read_wait);