diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 5ec19d91cf372..1f73fbfee0c06 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -5583,7 +5583,15 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
 		if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) {
 			arvif->beacon_buf = kmalloc(IEEE80211_MAX_FRAME_LEN,
 						    GFP_KERNEL);
-			arvif->beacon_paddr = (dma_addr_t)arvif->beacon_buf;
+
+			/* Using a kernel pointer in place of a dma_addr_t
+			 * token can lead to undefined behavior if that
+			 * makes it into cache management functions. Use a
+			 * known-invalid address token instead, which
+			 * avoids the warning and makes it easier to catch
+			 * bugs if it does end up getting used.
+			 */
+			arvif->beacon_paddr = DMA_MAPPING_ERROR;
 		} else {
 			arvif->beacon_buf =
 				dma_alloc_coherent(ar->dev,