diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index f41feebe4257..e50cf5b6a730 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -374,6 +374,7 @@ struct sunxi_nfc_caps {
  * @chips: a list containing all the NAND chips attached to this NAND
  *	   controller
  * @complete: a completion object used to wait for NAND controller events
+ * @irq: NAND controller interrupt
  * @dmac: the DMA channel attached to the NAND controller
  * @use_mdma: use an internal MBUS DMA backend
  * @mdma_desc: H6-style MBUS DMA descriptor
@@ -393,6 +394,7 @@ struct sunxi_nfc {
 	unsigned long clk_rate;
 	struct list_head chips;
 	struct completion complete;
+	int irq;
 	struct dma_chan *dmac;
 	bool use_mdma;
 	struct sunxi_nfc_mdma_desc *mdma_desc;
@@ -414,12 +416,13 @@ static irqreturn_t sunxi_nfc_interrupt(int irq, void *dev_id)
 	if (!(ien & st))
 		return IRQ_NONE;
 
-	if ((ien & st) == ien)
-		complete(&nfc->complete);
-
+	/* Finish updating the interrupt state before waking the next operation. */
 	writel(st & NFC_INT_MASK, nfc->regs + NFC_REG_ST);
 	writel(~st & ien & NFC_INT_MASK, nfc->regs + NFC_REG_INT);
 
+	if ((ien & st) == ien)
+		complete(&nfc->complete);
+
 	return IRQ_HANDLED;
 }
 
@@ -435,16 +438,19 @@ static int sunxi_nfc_wait_events(struct sunxi_nfc *nfc, u32 events,
 		timeout_ms = NFC_DEFAULT_TIMEOUT_MS;
 
 	if (!use_polling) {
-		init_completion(&nfc->complete);
+		reinit_completion(&nfc->complete);
 
 		writel(events, nfc->regs + NFC_REG_INT);
 
 		ret = wait_for_completion_timeout(&nfc->complete,
 						msecs_to_jiffies(timeout_ms));
-		if (!ret)
+		if (!ret) {
+			/* Drain the handler before it can restore an old IRQ mask. */
+			disable_irq(nfc->irq);
 			ret = -ETIMEDOUT;
-		else
+		} else {
 			ret = 0;
+		}
 
 		writel(0, nfc->regs + NFC_REG_INT);
 	} else {
@@ -457,6 +463,12 @@ static int sunxi_nfc_wait_events(struct sunxi_nfc *nfc, u32 events,
 
 	writel(events & NFC_INT_MASK, nfc->regs + NFC_REG_ST);
 
+	if (!use_polling && ret) {
+		/* Flush the mask and acknowledgment before re-enabling the IRQ. */
+		readl(nfc->regs + NFC_REG_INT);
+		enable_irq(nfc->irq);
+	}
+
 	if (ret)
 		dev_err(nfc->dev, "wait interrupt timedout\n");
 
@@ -2617,6 +2629,7 @@ static int sunxi_nfc_probe(struct platform_device *pdev)
 	nfc->dev = dev;
 	nand_controller_init(&nfc->controller);
 	INIT_LIST_HEAD(&nfc->chips);
+	init_completion(&nfc->complete);
 
 	nfc->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &r);
 	if (IS_ERR(nfc->regs))
@@ -2625,6 +2638,7 @@ static int sunxi_nfc_probe(struct platform_device *pdev)
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
 		return irq;
+	nfc->irq = irq;
 
 	nfc->caps = of_device_get_match_data(dev);
 	if (!nfc->caps)