diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 00f9fc992090..304000c3d433 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -2510,8 +2510,10 @@ static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd,
 		up(&dd->port->cmd_slot);
 		return NULL;
 	}
-	if (unlikely(*tag < 0))
+	if (unlikely(*tag < 0)) {
+		up(&dd->port->cmd_slot);
 		return NULL;
+	}
 
 	return dd->port->commands[*tag].sg;
 }