net/b43: don't return IRQ_HANDLED if nothing was done

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index fceb571..8bcda50 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -1964,7 +1964,7 @@
 		return IRQ_NONE;
 	reason &= dev->irq_mask;
 	if (!reason)
-		return IRQ_HANDLED;
+		return IRQ_NONE;
 
 	dev->dma_reason[0] = b43_read32(dev, B43_MMIO_DMA0_REASON)
 	    & 0x0001DC00;