Staging: vme: Correct tsi-148 VME interrupt free routine

As identified by Jiri, the VME interrupt free routine removes the service
routine before disabling the interrupt. Re-order operations to be performed in
the reverse of the request routine.
Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/vme/bridges/vme_tsi148.c

@@ -484,21 +484,22 @@ void tsi148_free_irq(int level, int statid)
 	/* Get semaphore */
 	down(&(vme_irq));
 
-	tsi148_bridge->irq[level - 1].callback[statid].func = NULL;
-	tsi148_bridge->irq[level - 1].callback[statid].priv_data = NULL;
 	tsi148_bridge->irq[level - 1].count--;
 
-	/* Disable IRQ level */
+	/* Disable IRQ level if no more interrupts attached at this level*/
 	if (tsi148_bridge->irq[level - 1].count == 0) {
-		tmp = ioread32be(tsi148_bridge->base + TSI148_LCSR_INTEO);
-		tmp &= ~TSI148_LCSR_INTEO_IRQEO[level - 1];
-		iowrite32be(tmp, tsi148_bridge->base + TSI148_LCSR_INTEO);
-
 		tmp = ioread32be(tsi148_bridge->base + TSI148_LCSR_INTEN);
 		tmp &= ~TSI148_LCSR_INTEN_IRQEN[level - 1];
 		iowrite32be(tmp, tsi148_bridge->base + TSI148_LCSR_INTEN);
+
+		tmp = ioread32be(tsi148_bridge->base + TSI148_LCSR_INTEO);
+		tmp &= ~TSI148_LCSR_INTEO_IRQEO[level - 1];
+		iowrite32be(tmp, tsi148_bridge->base + TSI148_LCSR_INTEO);
 	}
 
+	tsi148_bridge->irq[level - 1].callback[statid].func = NULL;
+	tsi148_bridge->irq[level - 1].callback[statid].priv_data = NULL;
+
 	/* Release semaphore */
 	up(&(vme_irq));
 }