diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 6a4a2a25d97a..061817a3a0e5 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1777,7 +1777,7 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
 	struct ahci_host_priv *hpriv;
 	unsigned int i, handled = 0;
 	void __iomem *mmio;
-	u32 irq_stat, irq_ack = 0;
+	u32 irq_stat;
 
 	VPRINTK("ENTER\n");
 
@@ -1809,14 +1809,11 @@ static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
 					"interrupt on disabled port %u\n", i);
 		}
 
-		irq_ack |= (1 << i);
-	}
-
-	if (irq_ack) {
-		writel(irq_ack, mmio + HOST_IRQ_STAT);
 		handled = 1;
 	}
 
+	writel(irq_stat, mmio + HOST_IRQ_STAT);
+
 	spin_unlock(&host->lock);
 
 	VPRINTK("EXIT\n");