diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 22cc8998d49c..82af3ccad885 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1231,8 +1231,9 @@ static int sunxi_nfc_oob_read_batch(struct nand_chip *nand,
 			continue;
 		}
 
-		if (erased) {
-			read->has_erased_chunk = true;
+		/* Both patterns are already filled; only all-ones is erased. */
+		if (pattern_found & BIT(i)) {
+			read->has_erased_chunk |= erased;
 			continue;
 		}