[SPARC]: sbus/envctrl: replace schedule_timeout() with msleep_interruptible()

Use msleep_interruptible() instead of schedule_timeout() to guarantee
the task delays as expected. Change the units of poll_interval to
msecs as it is only used in this delay.
Signed-off-by: NNishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: NDomen Puncer <domen@coderock.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/sbus/char/envctrl.c

@@ -1007,7 +1007,7 @@ static int kenvctrld(void *__unused)
 		return -ENODEV;
 	}
 
-	poll_interval = 5 * HZ; /* TODO env_mon_interval */
+	poll_interval = 5000; /* TODO env_mon_interval */
 
 	daemonize("kenvctrld");
 	allow_signal(SIGKILL);
@@ -1016,10 +1016,7 @@ static int kenvctrld(void *__unused)
 
 	printk(KERN_INFO "envctrl: %s starting...\n", current->comm);
 	for (;;) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule_timeout(poll_interval);
-
-		if(signal_pending(current))
+		if(msleep_interruptible(poll_interval))
 			break;
 
 		for (whichcpu = 0; whichcpu < ENVCTRL_MAX_CPU; ++whichcpu) {