[NET]: fix-up schedule_timeout() usage

Use schedule_timeout_{,un}interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size.  Also use
human-time conversion functions instead of hard-coded division to avoid
rounding issues.

Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 5d1e611..6f20b420 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -567,10 +567,8 @@
 	self->tty = NULL;
 
 	if (self->blocked_open) {
-		if (self->close_delay) {
-			current->state = TASK_INTERRUPTIBLE;
-			schedule_timeout(self->close_delay);
-		}
+		if (self->close_delay)
+			schedule_timeout_interruptible(self->close_delay);
 		wake_up_interruptible(&self->open_wait);
 	}
 
@@ -863,8 +861,7 @@
 	spin_lock_irqsave(&self->spinlock, flags);
 	while (self->tx_skb && self->tx_skb->len) {
 		spin_unlock_irqrestore(&self->spinlock, flags);
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(poll_time);
+		schedule_timeout_interruptible(poll_time);
 		spin_lock_irqsave(&self->spinlock, flags);
 		if (signal_pending(current))
 			break;