irda/sa1100_ir: check return value of startup hook

Signed-off-by: Dmitry Artamonow <mad_soft@inbox.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/sa1100_ir.c

@@ -232,8 +232,11 @@ static int sa1100_irda_startup(struct sa1100_irda *si)
 	/*
 	 * Ensure that the ports for this device are setup correctly.
 	 */
-	if (si->pdata->startup)
-		si->pdata->startup(si->dev);
+	if (si->pdata->startup)	{
+		ret = si->pdata->startup(si->dev);
+		if (ret)
+			return ret;
+	}
 
 	/*
 	 * Configure PPC for IRDA - we want to drive TXD2 low.