sky2: Fix for interrupt handler

Re-enable interrupts if it is not our interrupt

Signed-off-by: Mirko Lindner <mlindner@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index f1163b2..2b0748d 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -3080,8 +3080,10 @@
 
 	/* Reading this mask interrupts as side effect */
 	status = sky2_read32(hw, B0_Y2_SP_ISRC2);
-	if (status == 0 || status == ~0)
+	if (status == 0 || status == ~0) {
+		sky2_write32(hw, B0_Y2_SP_ICR, 2);
 		return IRQ_NONE;
+	}
 
 	prefetch(&hw->st_le[hw->st_idx]);