diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index c8b2add2640e..6c7921469b90 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -178,8 +178,19 @@ bool spi_mem_default_supports_op(struct spi_mem *mem,
 		if (op->data.swap16 && !spi_mem_controller_is_capable(ctlr, swap16))
 			return false;
 
-		if (op->cmd.nbytes != 2)
-			return false;
+		/* Extra 8D-8D-8D limitations */
+		if (op->cmd.dtr && op->cmd.buswidth == 8) {
+			if (op->cmd.nbytes != 2)
+				return false;
+
+			if ((op->addr.nbytes % 2) ||
+			    (op->dummy.nbytes % 2) ||
+			    (op->data.nbytes % 2)) {
+				dev_err(&ctlr->dev,
+					"Even byte numbers not allowed in octal DTR operations\n");
+				return false;
+			}
+		}
 	} else {
 		if (op->cmd.nbytes != 1)
 			return false;