diff --git a/drivers/firmware/samsung/exynos-acpm.c b/drivers/firmware/samsung/exynos-acpm.c
index 9766425a44ab..620880d8820a 100644
--- a/drivers/firmware/samsung/exynos-acpm.c
+++ b/drivers/firmware/samsung/exynos-acpm.c
@@ -105,11 +105,14 @@ struct acpm_queue {
  * @cmd:	pointer to where the data shall be saved.
  * @n_cmd:	number of 32-bit commands.
  * @rxcnt:	expected length of the response in 32-bit words.
+ * @completed:	flag indicating if the firmware response has been fully
+ *		processed.
  */
 struct acpm_rx_data {
 	u32 *cmd;
 	size_t n_cmd;
 	size_t rxcnt;
+	bool completed;
 };
 
 #define ACPM_SEQNUM_MAX    64
@@ -204,26 +207,28 @@ static void acpm_get_saved_rx(struct acpm_chan *achan,
 
 	rx_seqnum = FIELD_GET(ACPM_PROTOCOL_SEQNUM, rx_data->cmd[0]);
 
-	if (rx_seqnum == tx_seqnum) {
+	if (rx_seqnum == tx_seqnum)
 		memcpy(xfer->rxd, rx_data->cmd, xfer->rxcnt * sizeof(*xfer->rxd));
-		clear_bit(rx_seqnum - 1, achan->bitmap_seqnum);
-	}
 }
 
 /**
  * acpm_get_rx() - get response from RX queue.
  * @achan:	ACPM channel info.
  * @xfer:	reference to the transfer to get response for.
+ * @native_match: pointer to a boolean set to true if the thread natively
+ *                processed its own sequence number during this call.
  *
  * Return: 0 on success, -errno otherwise.
  */
-static int acpm_get_rx(struct acpm_chan *achan, const struct acpm_xfer *xfer)
+static int acpm_get_rx(struct acpm_chan *achan, const struct acpm_xfer *xfer,
+		       bool *native_match)
 {
 	u32 rx_front, rx_seqnum, tx_seqnum, seqnum;
 	const void __iomem *base, *addr;
 	struct acpm_rx_data *rx_data;
 	u32 i, val, mlen;
-	bool rx_set = false;
+
+	*native_match = false;
 
 	guard(mutex)(&achan->rx_lock);
 
@@ -232,10 +237,8 @@ static int acpm_get_rx(struct acpm_chan *achan, const struct acpm_xfer *xfer)
 
 	tx_seqnum = FIELD_GET(ACPM_PROTOCOL_SEQNUM, xfer->txd[0]);
 
-	if (i == rx_front) {
-		acpm_get_saved_rx(achan, xfer, tx_seqnum);
+	if (i == rx_front)
 		return 0;
-	}
 
 	base = achan->rx.base;
 	mlen = achan->mlen;
@@ -259,8 +262,13 @@ static int acpm_get_rx(struct acpm_chan *achan, const struct acpm_xfer *xfer)
 		if (rx_data->rxcnt) {
 			if (rx_seqnum == tx_seqnum) {
 				__ioread32_copy(xfer->rxd, addr, xfer->rxcnt);
-				rx_set = true;
-				clear_bit(seqnum, achan->bitmap_seqnum);
+				/*
+				 * Signal completion to the polling thread.
+				 * Pairs with smp_load_acquire() in polling
+				 * loop.
+				 */
+				smp_store_release(&rx_data->completed, true);
+				*native_match = true;
 			} else {
 				/*
 				 * The RX data corresponds to another request.
@@ -270,9 +278,21 @@ static int acpm_get_rx(struct acpm_chan *achan, const struct acpm_xfer *xfer)
 				 */
 				__ioread32_copy(rx_data->cmd, addr,
 						rx_data->rxcnt);
+				/*
+				 * Signal completion to the polling thread.
+				 * Pairs with smp_load_acquire() in polling
+				 * loop.
+				 */
+				smp_store_release(&rx_data->completed, true);
 			}
 		} else {
-			clear_bit(seqnum, achan->bitmap_seqnum);
+			/*
+			 * Signal completion to the polling thread.
+			 * Pairs with smp_load_acquire() in polling loop.
+			 */
+			smp_store_release(&rx_data->completed, true);
+			if (rx_seqnum == tx_seqnum)
+				*native_match = true;
 		}
 
 		i = (i + 1) % achan->qlen;
@@ -281,13 +301,6 @@ static int acpm_get_rx(struct acpm_chan *achan, const struct acpm_xfer *xfer)
 	/* We saved all responses, mark RX empty. */
 	writel(rx_front, achan->rx.rear);
 
-	/*
-	 * If the response was not in this iteration of the queue, check if the
-	 * RX data was previously saved.
-	 */
-	if (!rx_set)
-		acpm_get_saved_rx(achan, xfer, tx_seqnum);
-
 	return 0;
 }
 
@@ -302,6 +315,7 @@ static int acpm_dequeue_by_polling(struct acpm_chan *achan,
 				   const struct acpm_xfer *xfer)
 {
 	struct device *dev = achan->acpm->dev;
+	bool native_match;
 	ktime_t timeout;
 	u32 seqnum;
 	int ret;
@@ -310,12 +324,25 @@ static int acpm_dequeue_by_polling(struct acpm_chan *achan,
 
 	timeout = ktime_add_us(ktime_get(), ACPM_POLL_TIMEOUT_US);
 	do {
-		ret = acpm_get_rx(achan, xfer);
+		ret = acpm_get_rx(achan, xfer, &native_match);
 		if (ret)
 			return ret;
 
-		if (!test_bit(seqnum - 1, achan->bitmap_seqnum))
+		/*
+		 * Safely check if our specific transaction has been processed.
+		 * smp_load_acquire prevents the CPU from speculatively
+		 * executing subsequent instructions before the transaction is
+		 * synchronized.
+		 */
+		if (smp_load_acquire(&achan->rx_data[seqnum - 1].completed)) {
+			/* Retrieve payload if another thread cached it for us */
+			if (!native_match)
+				acpm_get_saved_rx(achan, xfer, seqnum);
+
+			/* Relinquish ownership of the sequence slot */
+			clear_bit(seqnum - 1, achan->bitmap_seqnum);
 			return 0;
+		}
 
 		/* Determined experimentally. */
 		udelay(20);
@@ -380,6 +407,7 @@ static void acpm_prepare_xfer(struct acpm_chan *achan,
 
 	/* Clear data for upcoming responses */
 	rx_data = &achan->rx_data[achan->seqnum - 1];
+	rx_data->completed = false;
 	memset(rx_data->cmd, 0, sizeof(*rx_data->cmd) * rx_data->n_cmd);
 	/* zero means no response expected */
 	rx_data->rxcnt = xfer->rxcnt;