ieee1394/amdtp: use poll_event*() interface

@@ -83,6 +83,7 @@
 #include <linux/ioctl32.h>
 #include <linux/compat.h>
 #include <linux/cdev.h>
+#include <linux/delay.h>
 #include <asm/uaccess.h>
 #include <asm/atomic.h>
 

@@ -314,16 +315,11 @@ void ohci1394_stop_it_ctx(struct ti_ohci
 		  OHCI1394_CONTEXT_RUN);
 	wmb();
 
-	if (synchronous) {
-		for (wait = 0; wait < 5; wait++) {
-			control = reg_read(ohci, OHCI1394_IsoXmitContextControlSet + ctx * 16);
-			if ((control & OHCI1394_CONTEXT_ACTIVE) == 0)
-				break;
-
-			set_current_state(TASK_INTERRUPTIBLE);
-			schedule_timeout(1);
-		}
-	}
+	if (synchronous)
+		/* check every ms for condition, up to 5 ms */
+		poll_event_interruptible_timeout((reg_read(ohci,
+			OHCI1394_IsoXmitContextControlSet + ctx * 16) &
+			OHCI1394_CONTEXT_ACTIVE == 0), 1, 5);
 }
 
 /* Note: we can test if free_packet_lists is empty without aquiring