diff --git a/drivers/mtd/nand/mtk_ecc.c b/drivers/mtd/nand/mtk_ecc.c
index dbf256217b3e..ada2d88fd4c7 100644
--- a/drivers/mtd/nand/mtk_ecc.c
+++ b/drivers/mtd/nand/mtk_ecc.c
@@ -116,6 +116,11 @@ static irqreturn_t mtk_ecc_irq(int irq, void *id)
 		op = ECC_DECODE;
 		dec = readw(ecc->regs + ECC_DECDONE);
 		if (dec & ecc->sectors) {
+			/*
+			 * Clear decode IRQ status once again to ensure that
+			 * there will be no extra IRQ.
+			 */
+			readw(ecc->regs + ECC_DECIRQ_STA);
 			ecc->sectors = 0;
 			complete(&ecc->done);
 		} else {
@@ -131,8 +136,6 @@ static irqreturn_t mtk_ecc_irq(int irq, void *id)
 		}
 	}
 
-	writel(0, ecc->regs + ECC_IRQ_REG(op));
-
 	return IRQ_HANDLED;
 }
 
@@ -342,6 +345,12 @@ void mtk_ecc_disable(struct mtk_ecc *ecc)
 
 	/* disable it */
 	mtk_ecc_wait_idle(ecc, op);
+	if (op == ECC_DECODE)
+		/*
+		 * Clear decode IRQ status in case there is a timeout to wait
+		 * decode IRQ.
+		 */
+		readw(ecc->regs + ECC_DECIRQ_STA);
 	writew(0, ecc->regs + ECC_IRQ_REG(op));
 	writew(ECC_OP_DISABLE, ecc->regs + ECC_CTL_REG(op));